WO2016193998A2 - Dispositif portatif pour capturer des images de fond d'œil - Google Patents

Dispositif portatif pour capturer des images de fond d'œil Download PDF

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Publication number
WO2016193998A2
WO2016193998A2 PCT/IN2016/000144 IN2016000144W WO2016193998A2 WO 2016193998 A2 WO2016193998 A2 WO 2016193998A2 IN 2016000144 W IN2016000144 W IN 2016000144W WO 2016193998 A2 WO2016193998 A2 WO 2016193998A2
Authority
WO
WIPO (PCT)
Prior art keywords
holder
stem
lens
smart phone
mobile
Prior art date
Application number
PCT/IN2016/000144
Other languages
English (en)
Other versions
WO2016193998A3 (fr
Inventor
Ashish Sharma
Saranya Devi SUBRAMANIAM
I Ramachandran K
Lakshmikanthan Chinnasamy
Original Assignee
Ashish Sharma
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 Ashish Sharma filed Critical Ashish Sharma
Publication of WO2016193998A2 publication Critical patent/WO2016193998A2/fr
Publication of WO2016193998A3 publication Critical patent/WO2016193998A3/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
    • A61B3/1208—Multiple lens hand-held instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions

Definitions

  • the present invention relates to a hand held device to capture fundus images, particularly to a low cost hand held device to image entire fundus either it is central or peripheral. More particularly, the present invention relates to smart phone based hand held device to capture regions of peripheral most retina such as ora serrata and further till pars plana apart from central fundus.
  • the present invention is operated by single hand.
  • Vision is one of the most valued of human sensory experiences. Vision loss is an often feared untoward health event associated with serious medical, psychological, social, and financial consequences. The preservation of vision has thus been an important goal of health interventions and is recognized as such by the World Health Organization.
  • vision loss can be caused by many factors, stemming from damage to all parts of the visual system. Retinal and optic nerve problems have emerged as leading causes of visual loss in developed countries. These posterior segment ophthalmic conditions are major and growing causes of vision loss globally, as well. Fortunately, many of these conditions, such as neovascular age-related macular degeneration, diabetic retinopathy, diabetic macular edema, proliferative diabetic retinopathy, retinal detachment, and glaucoma are treatable.
  • Smart phone has revolutionized the fundus imaging in recent past. It started with use of capturing images with the smart phone and slit lamp.
  • researchers have been successful in making indirect smart phone based devices and technique with the ability to image limited area of fundus in recent past. Perhaps previous researchers who belonged to the developed world made a sincere effort to help developing countries by exploring a mass screening tool in the form of the smart phone based indirect fundus camera.
  • the device could be held by one hand , and operated such that the other hand is available for other activities such as indentation.
  • the hand held device images regions of peripheral most retina such as ora serrata and even further till pars plana apart from central fundus. It is another object of the present invention, wherein the hand held device transmits the images to the required destinations/data storage devices.
  • a hand held device to capture fundus images comprising of a stem, a lens holder, a mobile holder, a lens and a smart phone having at least one camera.
  • the stem is having an upper end and a lower end wherein the mobile holder fitted with smart phone having at least one camera is mounted at the upper end of the stem and wherein the lens holder fitted with the lens is mounted at the lower end of the stem.
  • the upper flange is provided with one or more threaded holes of pre determined size which are arranged at pre determined location for detachably mounting the mobile holder.
  • the lower flange comprises a threaded hole of pre determined size arranged at a pre determine location for the fitment of the lens holder with the stem.
  • the lower flange comprises a radial recess of pre determined dimension and is disposed to locate and guide the cylindrical guide portion provided in the lens holder.
  • the lens holder comprises a base portion, a cylindrical shaped lens holding portion, a fork portion, a stepped portion and an eye portion.
  • the eye portion is provided with a cylindrical passage opening of pre detennined diameter which is disposed for accommodating the threaded portion of the knob provided for detachably connecting the lens holder and the stem.
  • the guide portion of pre determined dimensions is arranged at the base portion of the lens holder at a pre determined distance from the centre of the cylindrical passage opening in the longitudinal direction such that the lens holder could freely swing within the radial recess provided on the lower flange of the stem.
  • the mobile holder comprises a fixed holder and a movable holder
  • the fixed holder is fixed with the upper end of the stem
  • the moveable holder is slide ably mounted within the fixed holder to facilitate holing of the mobile phone.
  • FIG. 1 of the drawings schematically illustrates the perspective view of the apparatus according to the invention shown without the lens and the smart phone.
  • FIG. 1 schematically illustrate the perspective view of the stem according, to the invention.
  • FIG. 3 of the drawings schematically illustrate the bottom view of the stem according to the invention
  • Figure 4 of the drawings schematically illustrate the side view of the lens holder according to the present invention.
  • Figure 5 of the drawings schematically illustrate the bottom view of the lens holder according to the present invention.
  • Figure 6 of the drawings schematically illustrate the top view of the mobile holder according to the present invention.
  • Figure 7 of the drawings schematically illustrate the top view of the fixed holder according to the present invention.
  • Figure 8 of the drawings schematically illustrate bottom view of the fixed holder according to the present invention.
  • Figure 9 of the drawings schematically illustrate the top view of the moveable holder according to the present invention.
  • Figure 10 of the drawings schematically illustrate the bottom view of the moveable holder according to the present invention.
  • FIG. 1 1 of the drawings schematically illustrate the perspective view of the knob according to the present invention.
  • FIG. 12 of the drawings schematically illustrate the perspective view of the cover according to the present invention
  • the present invention is thus directed to a smart phone based hand held device to capture regions of peripheral most retina such as ora serrata and further till pars plana apart from central fundus.
  • the hand held device to capture fundus images comprises a stem ( 1); a lens holder (2) to hold a lens; a mobile holder (3) to hold a smart phone; and a knob (4).
  • upper end ( la) of the stem ( 1) is provided with an upper flange (lc) of pre-determined thickness and lower end ( lb) of the stem (1) is provided with a lower flange (Id) of pre- determined thickness.
  • the upper flange (lc) and the lower flange ( Id) are arranged at a pre determined angle to each other and connected by a curved portion (le) of pre determined radius and arch length.
  • the upper flange (lc) is provided with one or more threaded holes (If) of pre determined size for detachably mounting the mobile holder (3) .
  • the lower flange (Id) is provided with a threaded hole (I f) of pre determined size arranged at a pre determine location which is disposed for the fitment of the lens holder (2) with the stem (1) at required orientation with respect to the smart phone fitted on the mobile holder (3).
  • the threaded inserts may be provided at pre determined location during the moulding process instead of providing threaded holes (lf, l ).
  • the lower flange (Id) is further provide with a blind, oblong shaped radial recess (lg) of pre determined radial distance, width, arc length and depth which is disposed to locate and guide the cylindrical guide portion (2h) provided in the lens holder (2).
  • the bottom wall surface of the radial recess (lg) is provided with an array of serrations which are disposed to provide controlled movement of the lens holder.
  • the stem (1) is constructed with cross section which is approximately in the shape of U.
  • the stem (1) is preferably made of polymeric material of sufficient strength, such as Acrylonitrile Butadiene Styrene (ABS) and may be conveniently made by injection moulding process.
  • ABS Acrylonitrile Butadiene Styrene
  • the lens holder (2) comprises a base portion (2a), a cylindrical shaped lens holding portion (2b) of pre determined diameter having a stepped portion (2c) which is arranged to retain the lens at the pre determined location.
  • the lens holding portion (2b) comprises a fork portion (2d) to facilitate easy fixing and removal of the lens.
  • the lens holding portion (2b) and the base portion (2a) are connected by a curved portion (2e) having a radius equal to that of the radius of the curved portion (le) of the stem (1).
  • An eye portion (2f) is arranged within the U shaped curved portion (2e) and provided with a cylindrical passage opening (2g) of pre determined diameter which is disposed for accommodating the threaded portion (4b) of the knob (4) provided for detachably connecting the lens holder (2) and the stem (1).
  • An outwardly projecting cylindrical guide portion (2h) is arranged at the base portion (2a) of the lens holder (2).
  • the cylindrical guide portion (2h) is arranged at a pre determined distance from the centre of the cylindrical passage opening (2g) in the longitudinal direction and has pre determined diameter and height.
  • the diameter of the guide portion (2h) is selected such that it could move freely within the radial recess (lg) provided on the lower flange (Id) of the stem (1).
  • the lens holder (2) can be swivelled in radial direction and clamped with the stem (1) to obtain the required orientation between the lens fitted to the lens holder (2) and optical axis of the camera lens of the smart phone facing the lens holder (2) is in line with the optical axis of the concave lens fitted to the lens holder (2).
  • the lens holder (2) is preferably made of polymeric material of sufficient strength, for example Acrylonitrile Butadiene Styrene (ABS) and may be conveniently made by injection moulding process.
  • ABS Acrylonitrile Butadiene Styrene
  • the mobile holder (3) comprises a fixed holder (3a) and a movable holder (3b). While the fixed holder (3a) is fixed with the upper end (la) of the stem (1), the moveable holder (3b) is slide ably mounted within the fixed holder (3a) to facilitate holing of the smart phone.
  • the fixed holder (3a) of the mobile holder (3) is made as a separate part and fixed with the stem (1). However it is to be understood that it is possible to construct the stem (1) and the fixed holder (3a) of the mobile holder (3) as an integral part.
  • the fixed holder (3a) comprises fixing portion (3a 1) and having one or more fixed mobile catch (3a2) extending in vertical direction as shown in figure 7.
  • a recess portion (3a3) is provided at the bottom side of the fixing portion (3a 1) to facilitate locating and accommodating the upper flange portion (lc) of the stem (1).
  • the fixing portion (3a 1) further comprises one or more fixing holes (3a4) arranged suitable for accommodating countersunk screw.
  • the fixed holder (3a) further comprises a guiding portion (3a5) disposed to accommodate and retain the moveable holder (3b).
  • the guiding portion (3a5) comprises one or more guides (3a6) and a recess portion (3a7) to accommodate a compression spring (5).
  • the guiding portion (3a5) lies adjacent to the fixing portion (3al) at a lower level and is arranged parallel to the fixing portion (3al).
  • the recess portion (3a3) further provided with fixed spring guide (3a8) to retain the compression spring (5).
  • the fixed spring guide (3a8) is located within the recess portion (3a3) and extends in direction towards the moveable holder (3b).
  • the fixed holder (3a) is preferably made of polymeric material of sufficient strength, for example Acrylonitrile Butadiene Styrene (ABS) and may be conveniently made by injection moulding process.
  • ABS Acrylonitrile Butadiene Styrene
  • the movable holder (3b) comprises a sliding portion (3bl) and having one or more moveable mobile catch (3b2) extending in vertical direction.
  • the bottom side of the sliding portion (3b 1) is provided with one or more guides (3b3) to facilitate locating and sliding within the guiding part (3a5) of the fixed holder (3a).
  • the bottom side of the sliding portion (3b 1) is further provided with spring guiding portion (3b4) extending in down ward direction and provided with the moveable spring guide (3b5).
  • the moveable spring guide (3b5) is cylindrical in shape and has pre determined diameter and extends in direction towards the moveable mobile catch (3b2).
  • the movable holder (3b) is preferably made of polymeric material of sufficient strength, for example Acrylonitrile Butadiene Styrene (ABS) and may be conveniently made by injection moulding process.
  • ABS Acrylonitrile Butadiene Styrene
  • the movable holder (3b) is slide ably fitted to the fixed holder (3a), the compression spring (5) is assembled in the recess portion (3a3) and held by the fixed spring guide (3a8) and the moveable spring guide (3b5) such that the movable holder (3b) is pressed in the direction towards the fixed holder (3a) to enable holding of the smart phone between the fixed mobile catch (3a2) and the moveable mobile catch (3b2).
  • the fixed mobile catch (3a2) and the moveable mobile catch (3b2) are fitted with grips (7) made of soft material such as syntactic rubber to prevent the possible damage to the smart phone.
  • the cover (6) shown in figure 12 is prefe ably made of polymeric material, for example Acrylonitrile Butadiene Styrene (ABS) and may be conveniently made by injection moulding process.
  • the cover (6) may be detachably mounted with the help of one or more counter sunk screws or pasted using adhesive.
  • the mobile holder (3) is fitted to the upper end (la) of the stem (1) and the smart phone is mounted between the fixed mobile catch (3a2) and the moveable mobile catch (3b2).
  • the lens holder (2) mounted with lens is fitted to the lower end (l b) of the stem and swivelled until the required orientation is obtained between the lens and the lens fitted in the smart phone and clamped with the help of the knob (4).
  • the knob (4) comprises a head portion (4a) and a threaded portion (4b) provided with a circlip groove located at a pre determined distance from the head portion (4a) for fixing a circlip in order to prevent , the accidental fall of the lens holder during the adjustment.
  • the head portion of the knob (4a) can be conveniently made of synthetic material and can be moulded with the threaded portion (4b) made of metallic material.
  • the combination of the serration arranged in the recess portion (lg) of the stem (1 ) and the cylindrical guide portion (2h) of lens holder (2) provides controlled movement of the lens holder during the orientation of the lens fitted to the lens holder (2) and the lens fitted in the smart phone.
  • the device so arranged could be conveniently held by one hand of the user, the other hand is free for other activities associated with the examination of the eye.
  • the another advantage of the hand held device to capture fundus images according to the present invention is that it is possible to use the lens and smart phones normally in use by the oophthalmologists. Hence the cost of the hand held device to capture fundus images according to the present invention is extremely low as compared to the similar devices known in the art.
  • the smart phone can be advantageously loaded with exclusive applications for ease of operation, communication, storage and retrieval of the data.

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Eye Examination Apparatus (AREA)
  • Telephone Set Structure (AREA)

Abstract

La présente invention concerne un dispositif portatif utilisé pour capturer des images du fond de l'œil. Plus particulièrement, l'invention concerne un dispositif portatif économique permettant de former l'image de l'intégralité du fond de l'œil, qu'il soit central ou périphérique. L'invention est un dispositif portatif basé sur un téléphone intelligent susceptible de capturer des régions de la rétine la plus périphérique telle que l'ora serrata ou encore pars plana en plus du centre du fond de l'œil. De manière avantageuse, la présente invention est actionnée d'une seule main.
PCT/IN2016/000144 2015-06-05 2016-06-06 Dispositif portatif pour capturer des images de fond d'œil WO2016193998A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN2813CH2015 2015-06-05
IN2813/CHE/2015 2015-06-05

Publications (2)

Publication Number Publication Date
WO2016193998A2 true WO2016193998A2 (fr) 2016-12-08
WO2016193998A3 WO2016193998A3 (fr) 2017-03-09

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Application Number Title Priority Date Filing Date
PCT/IN2016/000144 WO2016193998A2 (fr) 2015-06-05 2016-06-06 Dispositif portatif pour capturer des images de fond d'œil

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WO (1) WO2016193998A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106923786A (zh) * 2017-04-13 2017-07-07 南京泰立瑞信息科技有限公司 一种手机用眼底拍摄架
WO2021135061A1 (fr) * 2020-05-29 2021-07-08 南通大学 Support photographique utilisé sur un microscope à lampe à fente ophtalmique
US11147441B2 (en) 2018-01-16 2021-10-19 Welch Allyn, Inc. Physical assessment device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011029064A1 (fr) * 2009-09-04 2011-03-10 University Of Virginia Patent Foundation Rétinographe à main portatif pour photographie de dépistage
WO2012177544A1 (fr) * 2011-06-18 2012-12-27 Intuitive Medical Technologies, Llc Adaptateur de téléphone intelligent pour ophtalmoscope

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106923786A (zh) * 2017-04-13 2017-07-07 南京泰立瑞信息科技有限公司 一种手机用眼底拍摄架
US11147441B2 (en) 2018-01-16 2021-10-19 Welch Allyn, Inc. Physical assessment device
USD959661S1 (en) 2018-01-16 2022-08-02 Welch Allyn, Inc. Medical viewing device
WO2021135061A1 (fr) * 2020-05-29 2021-07-08 南通大学 Support photographique utilisé sur un microscope à lampe à fente ophtalmique

Also Published As

Publication number Publication date
WO2016193998A3 (fr) 2017-03-09

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