WO2018061023A1 - Extraneous light blocking apparatus - Google Patents

Extraneous light blocking apparatus Download PDF

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Publication number
WO2018061023A1
WO2018061023A1 PCT/IN2017/050386 IN2017050386W WO2018061023A1 WO 2018061023 A1 WO2018061023 A1 WO 2018061023A1 IN 2017050386 W IN2017050386 W IN 2017050386W WO 2018061023 A1 WO2018061023 A1 WO 2018061023A1
Authority
WO
WIPO (PCT)
Prior art keywords
pair
light blocking
extraneous light
blocking apparatus
eye
Prior art date
Application number
PCT/IN2017/050386
Other languages
French (fr)
Inventor
Arjun Mulamoottil MOHAN
Shanmuganathan NAGARAJAN
Anand SIVARAMAN
Original Assignee
Remidio Innovative Solutions Pvt. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Remidio Innovative Solutions Pvt. Ltd. filed Critical Remidio Innovative Solutions Pvt. Ltd.
Publication of WO2018061023A1 publication Critical patent/WO2018061023A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/02—Goggles
    • A61F9/025—Special attachment of screens, e.g. hinged, removable; Roll-up protective layers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0018—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/16—Shades; shields; Obturators, e.g. with pinhole, with slot

Definitions

  • the present subject matter relates, in general, to an extraneous light blocking apparatus, and, in particular, to the extraneous light blocking apparatus adapted to be worn by a user.
  • Retinal images or fundus images may be used for diagnosis of various eye -related diseases, for example, diabetic retinopathy of human retina.
  • the retinal images or the fundus images may be captured by using ophthalmological imaging devices such as direct and indirect ophthalmoscopes.
  • ophthalmological imaging devices such as direct and indirect ophthalmoscopes.
  • performing fundus photography using the ophthalmological imaging devices in the presence of extraneous light, for example, sunlight may result in obtaining low quality and imperfect fundus images, which may complicate the diagnostic procedure of the various eye diseases.
  • Fig. la illustrates an extraneous light blocking apparatus in accordance with an embodiment of the present subject matter.
  • Fig. lb illustrates an unassembled state of the extraneous light blocking apparatus of the Fig. la in accordance with an embodiment of the present subject matter.
  • Fig.2 illustrates an exploded view of a shutter of the extraneous light blocking apparatus of the Fig. la, in accordance with an exemplary embodiment of the present subject matter.
  • Fig.3a illustrates an extraneous light blocking apparatus in accordance with another embodiment of the present subject matter.
  • Fig.3b illustrates an unassembled state of the extraneous light blocking apparatus of the Fig.3a in accordance with another embodiment of the present subject matter.
  • Fig.4a to Fig.4d illustrates different positions of an aperture of a shutter assembly of the extraneous light blocking apparatus of the Fig.3a, in accordance with an exemplary embodiment of the present subject matter.
  • the subject matter described herein relates to an extraneous light blocking apparatus, i.e., eye goggles, adapted to be worn by a user.
  • the present subject matter relates to the extraneous light blocking apparatus, which may prevent any interfering light source reaching eyes of the user during fundus photography.
  • Ophthalmological imaging devices such as direct and indirect ophthalmoscopes may be used to capture retinal images or fundus images of eyes of a user. While capturing fundus photograph, the presence of extraneous light, for example, sunlight may result in low and imperfect quality of the fundus images. For example, the presence of sunlight causes shrinking of user's pupils, which may reduce the effective pupil diameter and thereby results in producing low and imperfect quality of the fundus images, which can complicate the diagnostic procedure of the various eye diseases.
  • Eyecups of flexible material may be positioned to surround a user's eye to create a darkened environment during fundus imaging.
  • the eyecups may also be used to hold the eyelids open, perhaps through an angular internal spring mechanism that presses on the eyelid and holds it open.
  • the extraneous light may enter through a small gap at the interface between the eyecup and user's face. This may result in obtaining low quality fundus images.
  • the present subject matter relates to an extraneous light blocking apparatus, which may be adapted to be worn by a user to prevent extraneous light reaching the eyes while capturing fundus images of the eyes of the user.
  • the frame of the extraneous light blocking apparatus having at least one front portion comprises a pair of eye openings spaced apart, where the pair of eye openings defines openings for pair of eyes of the user.
  • the extraneous light blocking apparatus further comprises one or more shutters detachably fixed to the frame to close an eye opening of the pair of eye openings.
  • One of the one or more shutters comprises an aperture to adjust fixation of the eyes of the user for imaging different segments of the retina.
  • an extraneous light blocking apparatus comprises a frame having a first front portion, a second front portion, a shutter, and a pair of eye openings.
  • the first front portion comprises a pair of first openings and the second front portion comprises a pair of second openings.
  • the second front portion may be detachably fixed to the first front portion. When the second front portion is fixed to the first front portion, the pair of second openings may align with the pair of first openings to form the pair of eye openings, which are spaced apart.
  • the pair of eye openings may define openings for pair of eyes of the user.
  • shutter may be detachably fixed to the frame to close an eye opening of the pair of eye openings and to create dark environment in front of an eye facing the shutter while imaging retina of other eye through another eye opening of the pair of eye openings.
  • the shutter may be detachably fixed to the frame through a groove or a channel formed between the first front portion and the second front portion of the frame.
  • the shutter comprises an aperture to adjust fixation of the eyes of the user for imaging different segments of the retina.
  • the extraneous light blocking apparatus comprises a frame having a front portion comprising a pair of eye openings spaced apart and the frame comprises one or more guide rails.
  • the pair of eye openings defines openings for pair of eyes of the user.
  • the extraneous light blocking apparatus further comprises a shutter assembly detachably fixed to the frame to close an eye opening of the pair of eye openings and to create dark environment in front of an eye facing the shutter assembly while imaging retina of other eye through another eye opening of the pair of eye openings.
  • the shutter assembly comprises a pair of shutters.
  • One of the pair of shutters comprises an aperture to adjust fixation of the eyes of the user for imaging different segments of the retina.
  • the shutter assembly may be detachably fixed to the front portion of the frame through the one or more guide rails.
  • Fig. la illustrates an extraneous light blocking apparatus in accordance with an embodiment of the present subject matter.
  • the extraneous light blocking apparatus 100 comprises a frame 105, and a shutter 110.
  • the frame 105 comprises a first front portion 106 (shown in the Fig. lb), a second front portion 115, a pair of eye openings 120, and a pair of sidewalls 125.
  • the frame 105 is formed from a resilient flexible material.
  • the second front portion 115 may be detachably fixed to the first front portion 106 of the frame 105, for example, by using an adhesive.
  • the pair of sidewalls 125 may be substantially perpendicular to the front portions 106,115.
  • the first front portion 106 comprises two substantial identical opposite portions 107, a nose portion 108 and a pair of first openings 109 spaced apart (shown in the Fig. lb).
  • the second front portion 115 comprises two substantially identical opposite portions 130 joined by a bridge portion 135.
  • the second front portion 115 further comprises a pair of second openings 137 (shown in the Fig. lb) spaced apart.
  • Each identical opposite portion 130 may comprise an opening of the pair of second openings 137.
  • the second front portion 115 may comprise a nose section 140 extending upwardly into the bridge portion 135.
  • the pair of second openings 137 may align with the pair of first openings 109 to form the pair of eye openings 120.
  • the pair of eye openings 120 defines openings for pair of eyes of the user.
  • the pair of eye openings 120 are one of circular shaped, oval shaped, rectangular shaped and their like.
  • a groove or a channel 145 may be formed between the first front portion 106 and the second front portion 115 of the frame 105 when the second front portion 115 is fixed to the first front portion 106 of the frame 105.
  • a groove 145 is formed between the second front portion 115 and the first front portion 106 of the frame 105 as shown in the Fig. la.
  • the groove 145 may be formed on a top portion 150 and a bottom portion 155 of the frame 105 between the second front portion 115 and the first front portion 106 of the frame 105.
  • the extraneous light blocking apparatus 100 further comprises a support material 160, for example, disposable foam.
  • the disposable foam 160 comprises an upper portion 165, a lower portion 170, and a connecting portion 175 connecting the upper portion 165 and the lower portion 170, which are clearly depicted in the Fig. lb.
  • the disposable foam 160 may be detachably fixed to the inner face of the frame 105, for example, by using an adhesive.
  • the shutter 110 may be detachably fixed to the frame
  • the shutter 110 may be detachably fixed to the frame 105 through the groove 145 formed between the first front portion 106 and the second front portion 115.
  • the geometry of the groove 145 may be suitably sized so that the shutter 110 can be detachably fixed to the frame 105 through the groove 145.
  • the groove 145 is having a width substantially greater than a width of the shutter HO. The shutter 110 may be adapted to move in different directions when fixed to the frame 105 to adjust fixation of the eyes of the user for imaging different segments of the retina.
  • the larger geometric size of the groove 145 compared to the geometric size of the shutter 110 allows the shutter 110 to move in the different directions when fixed therein.
  • the different directions comprise a first direction, which is a direction along width of the eyes, and a second direction, which crosses substantially at a right angle with the first direction.
  • the shutter 110 may further comprise an aperture (not shown in the Fig. la).
  • the aperture may be used to adjust fixation of the eyes of the user for imaging different segments of the retina.
  • the aperture is used to stabilize the movement of eyes while capturing different segments of the retina.
  • An ophthalmologist can move the shutter 110 in different directions when the shutter 110 is fixed to the frame 105 thereby moving a position of the aperture with respect to the eye.
  • a suitable fundus imaging equipment may be used to image the retina through either of the eye openings 120.
  • the sidewalls 125 of the extraneous light blocking apparatus 100 may comprise a slot 180 to insert a strap for securing the extraneous light blocking apparatus 100 to the face of a user by making the strap go around the back of the head of the user.
  • the strap is generally formed from an elastomer material.
  • Fig. lb illustrates an unassembled state of an extraneous light blocking apparatus 100 of the Fig. la in accordance with an embodiment of the present subject matter.
  • the frame 105 fixed with disposable foam 160, and the shutter 110 may be provided to the ophthalmologist in unassembled state.
  • the ophthalmologist can perform the final steps of assembly according to preferences of the ophthalmologist. For example, to capture fundus images of a right eye of the user, the ophthalmologist closes an eye opening corresponding to a left eye of the user by inserting the shutter 110 through a groove 145 positioned near to the left eye thereby creating the dark environment in front of the left eye. Further, upon fixing the shutter 110 to the frame 105, the ophthalmologist can move the shutter 110 in the different directions to adjust fixation of the eyes of the user for imaging different segments of the retina.
  • Fig.2 illustrates an exploded view of the shutter of the extraneous light blocking apparatus of the Fig. la, in accordance with an exemplary embodiment of the present subject matter.
  • the shutter 110 comprises the aperture 205.
  • the aperture 205 may have a diameter of about 0.1mm to about 1.0mm. While capturing the fundus images, an ophthalmologist can adjust fixation of the eyes of the user facing the imaging apparatus by moving the shutter 110 in different directions and positioning the aperture 205 in the area of the eye openings 120 that is shown in Fig. la.
  • Fig.3a illustrates an extraneous light blocking apparatus in accordance with another embodiment of the present subject matter.
  • the extraneous light blocking apparatus 300 of the Fig.3a comprises a frame 305 and a shutter assembly 310.
  • the frame 305 may comprise a front portion 315 having two substantially identical opposite portions 320 joined by a bridge portion 325.
  • the frame 305 further comprises a pair of sidewalls 330.
  • the pair of sidewalls 330 may be substantially perpendicular to the front portion 315 of the frame 305.
  • the front portion 315 of the frame 305 may comprise a pair of eye openings 335.
  • the pair of eye openings 335 defines openings for a pair of eyes of the user.
  • Each identical opposite portion 320 may comprise an opening of the pair of eye openings 335.
  • the pair of eye openings 335 are one of circular shaped, oval shaped, rectangular shaped and their like.
  • the frame 305 comprises a nose section 340 extending upwardly into the bridge portion 325.
  • the frame 305 is formed from a resilient flexible material.
  • the frame 305 comprises one or more guide rails 345 as shown in the Fig.3a to detachably fix the shutter assembly 310 to the frame 305.
  • the one or more guide rails 345 are provided on a top and bottom portion of the front portion 315 of the frame 305.
  • the extraneous light blocking apparatus 300 further comprises a support material 350, for example, disposable foam.
  • the disposable foam 350 may be detachably fixed to an inner face of the front portion 315 of the frame 305 as shown in the Fig.3a.
  • the disposable foam 350 is fixed to the inner face of the frame 305 using an adhesive.
  • the disposable foam 350 comprises an upper portion 355, a lower portion 360, and a connecting portion 365 connecting the upper portion 355 and the lower portion 360 as shown in the Fig.3b.
  • the shutter assembly 310 may be detachably fixed to the frame
  • the shutter assembly 310 may be detachably fixed to the frame 305 through one or more guide rails 345.
  • An unassembled state of the shutter assembly 310 of the Fig.3a is shown in Fig.3b.
  • the shutter assembly 310 comprises a pair of shutters 370,375.
  • One of the pair of shutters 370,375 comprises an aperture 380 to adjust fixation of the eyes of the user for imaging different segments of the retina.
  • the pair of shutters 370,375 comprises an outer shutter 375 and an inner shutter 370 detachably fixed to the outer shutter 375.
  • the outer shutter 375 comprises an opening 385 and the inner shutter 370 comprises the aperture 380.
  • the size of the aperture 380 is smaller than the size of the opening 385.
  • the inner shutter 370 is adapted to move inside the outer shutter 375 to adjust a position of the aperture 380 within the opening 385 to adjust fixation of the eyes of the user for imaging different segments of the retina.
  • the positioning of the aperture 380 as described above is further detailed in the Fig.4a to Fig.4d.
  • Fig.3b illustrates an unassembled state of an extraneous light blocking apparatus 300 of the Fig.3a in accordance with an embodiment of the present subject matter.
  • the frame 305 fixed with disposable foam 350, and the shutter assembly 310 may be provided to an ophthalmologist in unassembled state.
  • the ophthalmologist can perform the final steps of assembly according to preferences of the ophthalmologist. For example, to capture fundus images of a right eye of the user, an opening corresponding to a left eye of the user is closed by the ophthalmologist by inserting the shutter assembly 310 through a guide rail 345 thereby creating the dark environment in front of the left eye.
  • the ophthalmologist can move the inner shutter 370 so that the aperture 380 is within the opening 385 to adjust fixation of the eyes of the user for imaging different segments of the retina and the positioning of the aperture 380 as described is further detailed in the Fig.4a to Fig.4d.
  • Fig.4a to Fig.4d illustrates different positions of an aperture of a shutter assembly of the extraneous light blocking apparatus of the Fig.3a, in accordance with an exemplary embodiment of the present subject matter.
  • the inner shutter 370 is adapted to move inside the outer shutter 375, to locate a variable position for the aperture 380 within the opening 385, to adjust fixation of the eyes of the user for imaging different segments of the retina.
  • an ophthalmologist can adjust the position of aperture 380 to adjust fixation of the eyes of the user.
  • the aperture 380 can be positioned around 360° within the opening 385. This arrangement facilitates to capture different segments of the retina and thereby ease the diagnostic procedure of the various eye diseases.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Ophthalmology & Optometry (AREA)
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Abstract

The present subject matter relates to an extraneous light blocking apparatus (100,300), which may be adapted to be worn by a user to prevent extraneous light reaching the eyes while capturing fundus images. The extraneous light blocking apparatus (100,300) comprises a frame (105,305) having one or more front portions (106,115,315), a pair of sidewalls (125,330), one or more shutters (110, 310) and a pair of eye openings (120, 335). In an embodiment, a shutter (110) is detachably fixed to the frame (105) to close an eye opening of the pair of eye openings (120) and to create dark environment in front of an eye facing the shutter (110) while imaging retina of other eye through another eye opening of the pair of eye openings (120). The shutter (110) comprises an aperture (205) to adjust fixation of the eyes of the user for imaging different segments of the retina.

Description

EXTRANEOUS LIGHT BLOCKING APPARATUS
TECHNICAL FIELD
[0001] The present subject matter relates, in general, to an extraneous light blocking apparatus, and, in particular, to the extraneous light blocking apparatus adapted to be worn by a user.
BACKGROUND
[0002] Retinal images or fundus images may be used for diagnosis of various eye -related diseases, for example, diabetic retinopathy of human retina. Conventionally, the retinal images or the fundus images may be captured by using ophthalmological imaging devices such as direct and indirect ophthalmoscopes. However, performing fundus photography using the ophthalmological imaging devices in the presence of extraneous light, for example, sunlight, may result in obtaining low quality and imperfect fundus images, which may complicate the diagnostic procedure of the various eye diseases.
BRIEF DESCRIPTION OF DRAWINGS
[0003] The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to reference like features and components.
[0004] Fig. la illustrates an extraneous light blocking apparatus in accordance with an embodiment of the present subject matter.
[0005] Fig. lb illustrates an unassembled state of the extraneous light blocking apparatus of the Fig. la in accordance with an embodiment of the present subject matter. [0006] Fig.2 illustrates an exploded view of a shutter of the extraneous light blocking apparatus of the Fig. la, in accordance with an exemplary embodiment of the present subject matter.
[0007] Fig.3a illustrates an extraneous light blocking apparatus in accordance with another embodiment of the present subject matter.
[0008] Fig.3b illustrates an unassembled state of the extraneous light blocking apparatus of the Fig.3a in accordance with another embodiment of the present subject matter.
[0009] Fig.4a to Fig.4d illustrates different positions of an aperture of a shutter assembly of the extraneous light blocking apparatus of the Fig.3a, in accordance with an exemplary embodiment of the present subject matter.
DETAILED DESCRIPTION
[0010] The subject matter described herein relates to an extraneous light blocking apparatus, i.e., eye goggles, adapted to be worn by a user. In particular, the present subject matter relates to the extraneous light blocking apparatus, which may prevent any interfering light source reaching eyes of the user during fundus photography.
[0011] Ophthalmological imaging devices such as direct and indirect ophthalmoscopes may be used to capture retinal images or fundus images of eyes of a user. While capturing fundus photograph, the presence of extraneous light, for example, sunlight may result in low and imperfect quality of the fundus images. For example, the presence of sunlight causes shrinking of user's pupils, which may reduce the effective pupil diameter and thereby results in producing low and imperfect quality of the fundus images, which can complicate the diagnostic procedure of the various eye diseases.
[0012] Conventionally, the effect of the extraneous light, for example, sunlight interference may be reduced by using eyecups. Eyecups of flexible material may be positioned to surround a user's eye to create a darkened environment during fundus imaging. The eyecups may also be used to hold the eyelids open, perhaps through an angular internal spring mechanism that presses on the eyelid and holds it open. Even with the use of eyecups, the extraneous light may enter through a small gap at the interface between the eyecup and user's face. This may result in obtaining low quality fundus images.
[0013] The present subject matter relates to an extraneous light blocking apparatus, which may be adapted to be worn by a user to prevent extraneous light reaching the eyes while capturing fundus images of the eyes of the user. The frame of the extraneous light blocking apparatus having at least one front portion comprises a pair of eye openings spaced apart, where the pair of eye openings defines openings for pair of eyes of the user. The extraneous light blocking apparatus further comprises one or more shutters detachably fixed to the frame to close an eye opening of the pair of eye openings. One of the one or more shutters comprises an aperture to adjust fixation of the eyes of the user for imaging different segments of the retina.
[0014] In an embodiment, an extraneous light blocking apparatus comprises a frame having a first front portion, a second front portion, a shutter, and a pair of eye openings. The first front portion comprises a pair of first openings and the second front portion comprises a pair of second openings. The second front portion may be detachably fixed to the first front portion. When the second front portion is fixed to the first front portion, the pair of second openings may align with the pair of first openings to form the pair of eye openings, which are spaced apart. The pair of eye openings may define openings for pair of eyes of the user. Further, shutter may be detachably fixed to the frame to close an eye opening of the pair of eye openings and to create dark environment in front of an eye facing the shutter while imaging retina of other eye through another eye opening of the pair of eye openings. For example, the shutter may be detachably fixed to the frame through a groove or a channel formed between the first front portion and the second front portion of the frame. The shutter comprises an aperture to adjust fixation of the eyes of the user for imaging different segments of the retina. [0015] In another embodiment of the present subject matter, the extraneous light blocking apparatus comprises a frame having a front portion comprising a pair of eye openings spaced apart and the frame comprises one or more guide rails. The pair of eye openings defines openings for pair of eyes of the user. The extraneous light blocking apparatus further comprises a shutter assembly detachably fixed to the frame to close an eye opening of the pair of eye openings and to create dark environment in front of an eye facing the shutter assembly while imaging retina of other eye through another eye opening of the pair of eye openings. The shutter assembly comprises a pair of shutters. One of the pair of shutters comprises an aperture to adjust fixation of the eyes of the user for imaging different segments of the retina. Further, the shutter assembly may be detachably fixed to the front portion of the frame through the one or more guide rails.
[0016] Fig. la illustrates an extraneous light blocking apparatus in accordance with an embodiment of the present subject matter. As shown in the Fig. la, the extraneous light blocking apparatus 100 comprises a frame 105, and a shutter 110. The frame 105 comprises a first front portion 106 (shown in the Fig. lb), a second front portion 115, a pair of eye openings 120, and a pair of sidewalls 125. In an aspect, the frame 105 is formed from a resilient flexible material. The second front portion 115 may be detachably fixed to the first front portion 106 of the frame 105, for example, by using an adhesive. The pair of sidewalls 125 may be substantially perpendicular to the front portions 106,115. The first front portion 106 comprises two substantial identical opposite portions 107, a nose portion 108 and a pair of first openings 109 spaced apart (shown in the Fig. lb).
[0017] Further, the second front portion 115 comprises two substantially identical opposite portions 130 joined by a bridge portion 135. The second front portion 115 further comprises a pair of second openings 137 (shown in the Fig. lb) spaced apart. Each identical opposite portion 130 may comprise an opening of the pair of second openings 137. Further, the second front portion 115 may comprise a nose section 140 extending upwardly into the bridge portion 135. When the second front portion 115 is fixed to the first front portion 106, the pair of second openings 137 may align with the pair of first openings 109 to form the pair of eye openings 120. The pair of eye openings 120 defines openings for pair of eyes of the user. For example, the pair of eye openings 120, are one of circular shaped, oval shaped, rectangular shaped and their like.
[0018] In an aspect, a groove or a channel 145 may be formed between the first front portion 106 and the second front portion 115 of the frame 105 when the second front portion 115 is fixed to the first front portion 106 of the frame 105. For the sake of brevity, a groove 145 is formed between the second front portion 115 and the first front portion 106 of the frame 105 as shown in the Fig. la. However, the groove 145 may be formed on a top portion 150 and a bottom portion 155 of the frame 105 between the second front portion 115 and the first front portion 106 of the frame 105.
[0019] In an embodiment, the extraneous light blocking apparatus 100 further comprises a support material 160, for example, disposable foam. The disposable foam 160 comprises an upper portion 165, a lower portion 170, and a connecting portion 175 connecting the upper portion 165 and the lower portion 170, which are clearly depicted in the Fig. lb. The disposable foam 160 may be detachably fixed to the inner face of the frame 105, for example, by using an adhesive.
[0020] In an aspect, the shutter 110 may be detachably fixed to the frame
105 to close an eye opening of the pair of eye openings 140 and to create the dark environment in front of an eye facing the shutter 110 while imaging retina of other eye through another eye opening of the pair of eye openings 140. For instance, the shutter 110 may be detachably fixed to the frame 105 through the groove 145 formed between the first front portion 106 and the second front portion 115. Although a single shutter 110 is shown in the Fig. la, it may be understood that any number of shutters can be used to create the dark environment. In an aspect, the geometry of the groove 145 may be suitably sized so that the shutter 110 can be detachably fixed to the frame 105 through the groove 145. For instance, the groove 145 is having a width substantially greater than a width of the shutter HO.The shutter 110 may be adapted to move in different directions when fixed to the frame 105 to adjust fixation of the eyes of the user for imaging different segments of the retina.
[0021] The larger geometric size of the groove 145 compared to the geometric size of the shutter 110 allows the shutter 110 to move in the different directions when fixed therein. For example, the different directions comprise a first direction, which is a direction along width of the eyes, and a second direction, which crosses substantially at a right angle with the first direction. The shutter 110 may further comprise an aperture (not shown in the Fig. la). In an aspect, the aperture may be used to adjust fixation of the eyes of the user for imaging different segments of the retina. For example, the aperture is used to stabilize the movement of eyes while capturing different segments of the retina. An ophthalmologist can move the shutter 110 in different directions when the shutter 110 is fixed to the frame 105 thereby moving a position of the aperture with respect to the eye. A suitable fundus imaging equipment may be used to image the retina through either of the eye openings 120.
[0022] Further, in an embodiment, the sidewalls 125 of the extraneous light blocking apparatus 100 may comprise a slot 180 to insert a strap for securing the extraneous light blocking apparatus 100 to the face of a user by making the strap go around the back of the head of the user. For example, the strap is generally formed from an elastomer material.
[0023] Fig. lb illustrates an unassembled state of an extraneous light blocking apparatus 100 of the Fig. la in accordance with an embodiment of the present subject matter. In some embodiments, the frame 105 fixed with disposable foam 160, and the shutter 110 may be provided to the ophthalmologist in unassembled state. The ophthalmologist can perform the final steps of assembly according to preferences of the ophthalmologist. For example, to capture fundus images of a right eye of the user, the ophthalmologist closes an eye opening corresponding to a left eye of the user by inserting the shutter 110 through a groove 145 positioned near to the left eye thereby creating the dark environment in front of the left eye. Further, upon fixing the shutter 110 to the frame 105, the ophthalmologist can move the shutter 110 in the different directions to adjust fixation of the eyes of the user for imaging different segments of the retina.
[0024] Fig.2 illustrates an exploded view of the shutter of the extraneous light blocking apparatus of the Fig. la, in accordance with an exemplary embodiment of the present subject matter. As mentioned previously, the shutter 110 comprises the aperture 205. In an aspect, the aperture 205 may have a diameter of about 0.1mm to about 1.0mm. While capturing the fundus images, an ophthalmologist can adjust fixation of the eyes of the user facing the imaging apparatus by moving the shutter 110 in different directions and positioning the aperture 205 in the area of the eye openings 120 that is shown in Fig. la.
[0025] Fig.3a illustrates an extraneous light blocking apparatus in accordance with another embodiment of the present subject matter. The extraneous light blocking apparatus 300 of the Fig.3a comprises a frame 305 and a shutter assembly 310. In an embodiment, the frame 305 may comprise a front portion 315 having two substantially identical opposite portions 320 joined by a bridge portion 325. The frame 305 further comprises a pair of sidewalls 330. The pair of sidewalls 330 may be substantially perpendicular to the front portion 315 of the frame 305. The front portion 315 of the frame 305 may comprise a pair of eye openings 335. The pair of eye openings 335 defines openings for a pair of eyes of the user. Each identical opposite portion 320 may comprise an opening of the pair of eye openings 335. For example, the pair of eye openings 335 are one of circular shaped, oval shaped, rectangular shaped and their like. The frame 305 comprises a nose section 340 extending upwardly into the bridge portion 325. In an aspect, the frame 305 is formed from a resilient flexible material. In an embodiment, the frame 305 comprises one or more guide rails 345 as shown in the Fig.3a to detachably fix the shutter assembly 310 to the frame 305. In an example, the one or more guide rails 345 are provided on a top and bottom portion of the front portion 315 of the frame 305. In another example, the one or more guide rails 345 are provided on a side portion of the front portion 315 of the frame 305. [0026] The extraneous light blocking apparatus 300 further comprises a support material 350, for example, disposable foam. The disposable foam 350 may be detachably fixed to an inner face of the front portion 315 of the frame 305 as shown in the Fig.3a. For example, the disposable foam 350 is fixed to the inner face of the frame 305 using an adhesive. The disposable foam 350 comprises an upper portion 355, a lower portion 360, and a connecting portion 365 connecting the upper portion 355 and the lower portion 360 as shown in the Fig.3b.
[0027] The shutter assembly 310 may be detachably fixed to the frame
305 to close an eye opening of the pair of eye openings 335 and to create a dark environment in front of an eye facing the shutter assembly 310 while imaging retina of other eye through another eye opening of the pair of eye openings 335. The shutter assembly 310 may be detachably fixed to the frame 305 through one or more guide rails 345. An unassembled state of the shutter assembly 310 of the Fig.3a is shown in Fig.3b. The shutter assembly 310 comprises a pair of shutters 370,375. One of the pair of shutters 370,375 comprises an aperture 380 to adjust fixation of the eyes of the user for imaging different segments of the retina. In an embodiment, the pair of shutters 370,375 comprises an outer shutter 375 and an inner shutter 370 detachably fixed to the outer shutter 375. The outer shutter 375 comprises an opening 385 and the inner shutter 370 comprises the aperture 380. In an aspect, the size of the aperture 380 is smaller than the size of the opening 385. Further, the inner shutter 370 is adapted to move inside the outer shutter 375 to adjust a position of the aperture 380 within the opening 385 to adjust fixation of the eyes of the user for imaging different segments of the retina. The positioning of the aperture 380 as described above is further detailed in the Fig.4a to Fig.4d.
[0028] Fig.3b illustrates an unassembled state of an extraneous light blocking apparatus 300 of the Fig.3a in accordance with an embodiment of the present subject matter. In some embodiments, the frame 305 fixed with disposable foam 350, and the shutter assembly 310 may be provided to an ophthalmologist in unassembled state. The ophthalmologist can perform the final steps of assembly according to preferences of the ophthalmologist. For example, to capture fundus images of a right eye of the user, an opening corresponding to a left eye of the user is closed by the ophthalmologist by inserting the shutter assembly 310 through a guide rail 345 thereby creating the dark environment in front of the left eye. Further, upon fixing the shutter assembly 310 to the frame 305, the ophthalmologist can move the inner shutter 370 so that the aperture 380 is within the opening 385 to adjust fixation of the eyes of the user for imaging different segments of the retina and the positioning of the aperture 380 as described is further detailed in the Fig.4a to Fig.4d.
[0029] Fig.4a to Fig.4d illustrates different positions of an aperture of a shutter assembly of the extraneous light blocking apparatus of the Fig.3a, in accordance with an exemplary embodiment of the present subject matter. The inner shutter 370 is adapted to move inside the outer shutter 375, to locate a variable position for the aperture 380 within the opening 385, to adjust fixation of the eyes of the user for imaging different segments of the retina. As shown in the Fig.4a to Fig.4d, an ophthalmologist can adjust the position of aperture 380 to adjust fixation of the eyes of the user. In an example, the aperture 380 can be positioned around 360° within the opening 385. This arrangement facilitates to capture different segments of the retina and thereby ease the diagnostic procedure of the various eye diseases.
[0030] Although embodiments for extraneous light blocking apparatus have been described in language specific to structural features, it is to be understood that the appended claims are not necessarily limited to the specific features or the methods described. Rather, the specific features are disclosed as example embodiments.

Claims

I/We claim:
1. An extraneous light blocking apparatus (100) adapted to be worn by a user, the extraneous light blocking apparatus (100) comprising:
a frame (105) comprising a pair of eye openings (120) spaced apart, wherein the pair of eye openings (120) define openings for a pair of eyes of the user; and
a shutter (110) detachably fixed to the frame (105) to close an eye opening of the pair of eye openings (120), wherein the shutter (110) comprises an aperture (205) to adjust fixation of the eyes of the user for imaging different segments of the retina.
2. The extraneous light blocking apparatus (100) as claimed in the claim 1, wherein the frame (105) comprises:
a first front portion (106) comprising a pair of first openings (109) spaced apart; and
a second front portion (115) detachably fixed to the first front portion (106), wherein the second front portion (115) comprises a pair of second openings (137) spaced apart and aligns with the pair of first openings (109) to form the pair of eye openings (120).
3. The extraneous light blocking apparatus (100) as claimed in claim 1, wherein the extraneous light blocking apparatus (100) comprises a support material (160) detachably fixed to an inner surface of the frame (105).
4. The extraneous light blocking apparatus (100) as claimed in claim 1, wherein the shutter (110) is adapted to move in different directions when fixed to the frame (105), to adjust fixation of the eyes of the user for imaging different segments of the retina.
5. The extraneous light blocking apparatus (100) as claimed in claim 1, wherein the extraneous light blocking apparatus (100) comprises a groove (145) to detachably fix the shutter (110) to the frame (105), wherein the groove (145) is formed between the second front portion (115) and the first front portion (106) of the frame (105).
6. The extraneous light blocking apparatus (100) as claimed in claim 5, wherein the groove (145) is having a width substantially greater than a width of the shutter (110).
7. The extraneous light blocking apparatus (100) as claimed in claim 1, wherein the pair of eye openings (120) are one of circular shaped, oval shaped, square shaped, rectangular shaped, and their like.
8. The extraneous light blocking apparatus (100) as claimed in claim 1, wherein the aperture (205) is having a diameter of about 0.1mm to about 1.0mm.
9. The extraneous light blocking apparatus (100) as claimed in claim 1, wherein the frame (105) is formed from a resilient flexible material.
10. The extraneous light blocking apparatus (100) as claimed in claim 1, wherein the shutter (100) creates a dark environment in front of an eye facing the shutter (110) while imaging retina of another eye through another eye opening of the pair of eye openings (120).
11. An extraneous light blocking apparatus (300) adapted to be worn by a user, the extraneous light blocking apparatus (300) comprising:
a frame (305) having a front portion (315) comprises a pair of eye openings (335) spaced apart, wherein the pair of eye openings (335) define openings for a pair of eyes of the user; and
a shutter assembly (310) detachably fixed to the frame (305) to close an eye opening of the pair of eye openings (335), wherein the shutter assembly
(310) comprises a pair of shutters (370,375), and wherein one of the pair of shutters (370, 375) comprise an aperture (380) to adjust fixation of the eyes of the user for imaging different segments of the retina.
12. The extraneous light blocking apparatus (300) as claimed in claim 11, wherein the pair of shutters (375, 370) comprises an outer shutter (375) and an inner shutter (370) detachably fixed inside the outer shutter (375).
13. The extraneous light blocking apparatus (300) as claimed in claim 12, wherein the outer shutter (375) comprises an opening (385) and the inner shutter (370) comprises the aperture (380).
14. The extraneous light blocking apparatus (300) as claimed in claim 11, wherein a size of the aperture (380) is smaller than a size of the opening (385).
15. The extraneous light blocking apparatus (300) as claimed in claim 12, wherein the inner shutter (370) is adapted to move inside the outer shutter (375), to locate a variable position for the aperture (380) within the opening (385), to adjust fixation of the eyes of the user for imaging different segments of the retina.
16. The extraneous light blocking apparatus (300) as claimed in claim 11, wherein the frame (305) comprises one or more guide rails to detachably fix the shutter assembly (310) to the frame (305).
17. The extraneous light blocking apparatus (300) as claimed in claim 11, wherein the extraneous light blocking apparatus (300) comprises support material (350) detachably fixed to an inner surface of the frame (305).
18. The extraneous light blocking apparatus (300) as claimed in claim 11, wherein the pair of eye openings (335) are one of circular shaped, oval shaped, square shaped, rectangular shaped, and their like.
19. The extraneous light blocking apparatus (300) as claimed in claim 11, wherein the aperture (380) is having a diameter of about 0.1mm to about 1.0mm.
20. The extraneous light blocking apparatus (300) as claimed in claim 11, wherein the shutter assembly (310) creates a dark environment in front of an eye facing the shutter assembly (310), while imaging retina of an other eye through another eye opening of the pair of eye openings (335).
21. An extraneous light blocking apparatus (100,300) adapted to be worn by a user, the extraneous light blocking apparatus (100,300) comprising:
a frame (105, 305) having at least one front portion (106, 115, 315) comprises a pair of eye openings (120, 335) spaced apart, wherein the pair of eye openings (120, 335) define openings for pair of eyes of the user; and
one or more shutters (110, 310) detachably fixed to the frame (105, 305) to close an eye opening of the pair of eye openings (120, 335), wherein one of the one or more shutters (110, 310) comprise an aperture (205, 380) to adjust fixation of the eyes of the user for imaging different segments of the retina.
PCT/IN2017/050386 2016-09-28 2017-09-07 Extraneous light blocking apparatus WO2018061023A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201641033213 2016-09-28
IN201641033213 2016-09-28

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125298A (en) * 1982-08-19 1984-03-07 Eos Lee Theunissen Device for use in practising or playing golf
US5541675A (en) * 1995-03-29 1996-07-30 Hickey; Douglas G. Shooting glasses
US5996129A (en) * 1998-04-30 1999-12-07 Lopez; Jose A. Goggles
WO2014119949A1 (en) * 2013-02-01 2014-08-07 So Il Sop Assisting device detachably attached to golf glasses for providing color focus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125298A (en) * 1982-08-19 1984-03-07 Eos Lee Theunissen Device for use in practising or playing golf
US5541675A (en) * 1995-03-29 1996-07-30 Hickey; Douglas G. Shooting glasses
US5996129A (en) * 1998-04-30 1999-12-07 Lopez; Jose A. Goggles
WO2014119949A1 (en) * 2013-02-01 2014-08-07 So Il Sop Assisting device detachably attached to golf glasses for providing color focus

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