CN112716444A - Quick pupil distance measuring device - Google Patents
Quick pupil distance measuring device Download PDFInfo
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- CN112716444A CN112716444A CN202011545901.0A CN202011545901A CN112716444A CN 112716444 A CN112716444 A CN 112716444A CN 202011545901 A CN202011545901 A CN 202011545901A CN 112716444 A CN112716444 A CN 112716444A
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- light source
- distance
- measuring
- pointer
- aligning
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- 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
- A61B3/11—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring interpupillary distance or diameter of pupils
- A61B3/111—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring interpupillary distance or diameter of pupils for measuring interpupillary distance
Abstract
The invention discloses a rapid pupil distance measuring device, which attracts a measured person to watch through a light source which can flash and/or emit light with different colors, forms a light spot at the center of the pupil of the measured person, and aims at the light spot through a linear alignment structure to measure the pupil distance, thereby solving the problems that the pupil is difficult to keep still, the infant is not matched and the measuring precision is poor. The key points of the technical scheme are as follows: the distance adjusting device comprises a picture frame, a reference light source and a distance adjusting mechanism for adjusting the distance between the reference light source and the picture frame, wherein the reference light source adopts a point light source and can flicker and/or emit different colors of bright light; the picture frame is provided with two view ports and a measuring mechanism for measuring the pupil distance, wherein the measuring mechanism comprises two aligning pieces for aligning measuring points in the pupil and a distance measuring piece for measuring the distance between the two aligning pieces; the distance adjusting mechanism comprises a sliding rod and a sliding block, the sliding rod is horizontally arranged, the sliding block can slide on the sliding rod, scales are arranged on the sliding rod, and the reference light source and the sliding block move synchronously.
Description
Technical Field
The invention relates to the technical field of ophthalmic treatment, in particular to a rapid pupil distance measuring device.
Background
The interpupillary Distance (PD) is defined as the Distance between the centers of pupils of both eyes, and generally includes a far interpupillary Distance and a near interpupillary Distance, and the far interpupillary Distance and the near interpupillary Distance are measured at different measurement distances. The interpupillary distance is typically measured using two methods: the distance from the center of the pupil of the right eye to the center of the pupil of the left eye; the second is the distance from the outer edge of the pupil of the right eye (temporal side) to the inner edge of the pupil of the left eye (nasal side), or the distance from the inner edge of the pupil of the right eye (nasal side) to the outer edge of the pupil of the left eye (temporal side).
The pupil distance needs to be measured during visual examination and clinical fitting, the distance between the centers of the two lenses (optical center distance) should be matched with the pupil distance of a patient, otherwise, even if the degree is correct, the patient can feel uncomfortable after wearing the glasses, and the vision is affected.
The existing method for measuring the interpupillary distance comprises the following three steps: firstly, a measuring point in the pupil is directly measured by adopting a graduated ruler; secondly, a spot light source (such as a pen lamp) is adopted to irradiate to reflect a light spot in the pupil, and then a graduated scale is adopted to measure the distance between the light spots; thirdly, measuring by adopting a pupillometer. However, the conventional method for measuring the interpupillary distance has the following defects:
1. when measuring the interpupillary distance, the user needs to fix the front and keep the front immovably by two eyes, but the measured person, especially the young infant is difficult to cooperate with the measurement, and the long-time eyeball immobility or fixation light source cannot be ensured, so that enough time cannot be reserved for measuring the interpupillary distance.
2. When the graduated scale is used for direct measurement, the measurement error is possibly large due to inaccurate alignment of the measuring point and the problems of the graduated scale such as deviation and jitter during measurement.
3. The pupil distance meter is not suitable for measuring young infants.
Disclosure of Invention
The present invention is directed to solve the above problems in the background art, and an object of the present invention is to provide a rapid pupil distance measuring device, which attracts a subject to watch through a light source that can flash and/or emit light of different colors, forms a light spot at the center of a pupil of the subject, and measures the pupil distance by aligning the light spot through a linear alignment structure, thereby solving the problems that the pupil is difficult to keep still, the infant is not fit, and the measurement accuracy is poor.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
a rapid pupil distance measuring device comprises a picture frame, a reference light source and a distance adjusting mechanism for adjusting the distance between the reference light source and the picture frame, wherein the reference light source adopts a point light source, and the reference light source can flicker and/or emit light with different colors; the picture frame is provided with two view ports and a measuring mechanism for measuring the interpupillary distance, and the measuring mechanism comprises two aligning pieces for aligning a measuring point in a pupil and a distance measuring piece for measuring the distance between the two aligning pieces; the distance adjusting mechanism comprises a sliding rod and a sliding block, the sliding rod is horizontally arranged, the sliding block can slide on the sliding rod, scales are arranged on the sliding rod, and the reference light source and the sliding block move synchronously.
Compared with the prior art, the rapid pupil distance measuring device adopting the technical scheme has the following beneficial effects:
the reference light source can flash and/or emit light with different colors to attract the attention of a tested person, particularly for infants, corresponding actions (keeping pupils still) are difficult to do according to the requirements of doctors, and the mode that the pupils of the infants are kept still through attracting the attention is effective.
Second, reference light source reflection formation bright spot in measurand pupil, aim at the piece through control and aim at the light spot, observe range finding piece alright in order to learn the interpupillary distance, for handheld scale measuring mode, this scheme is favorable to more conveniently and aims at the measuring point in the pupil more accurately.
And thirdly, the measurement of the far pupil distance and the near pupil distance is conveniently switched through the distance adjusting mechanism.
Preferably, the reference light source comprises a back plate and at least one point light source, the back plate is of a single color, the point light source is arranged on the side surface of the back plate facing the mirror frame, the back plate is of a single color, the attraction of the surrounding environment can be reduced as far as possible, the point light source is protruded, a measured person can naturally watch the point light source, and a condition is provided for measuring the interpupillary distance.
Preferably, measuring mechanism still includes the base, aim at the piece and include support and threadiness and aim at the structure, the threadiness is aimed at the vertical setting of structure and is located viewport the place ahead, it includes scale plate and two pointers to find range the piece, the scale plate is located on the base, two support that aim at the piece are connected a pointer respectively, pointer and base sliding connection adopt the threadiness to aim at the structure and can reach the purpose of aiming at pupil measuring point, can prevent again to shelter from during the light source gets into the pupil, avoid producing the reflection and cause the interference to the measurement, through the scale of reading between two pointers, alright in order to learn the interpupillary distance directly.
Preferably, the measuring mechanism further comprises a base, the aligning member comprises a support and a linear aligning structure, the distance measuring member comprises a scale plate and a pointer, the scale plate and the pointer are both connected with the base in a sliding mode, the support of one aligning member is fixedly connected with the scale plate, the linear aligning structure of the aligning member is aligned with a zero scale mark of the scale plate, the support of the other aligning member is fixedly connected with the pointer, and the linear aligning structure of the aligning member is aligned with the pointer.
Preferably, the base is equipped with the fine setting structure that is used for adjusting scale plate and pointer position, avoids the range of regulation too big, increases the alignment degree of difficulty through the fine setting structure, is favorable to improving measurement accuracy.
Preferably, the fine setting structure is two fine setting knobs, and the both sides of base are located respectively to two fine setting knobs, and scale board and pointer are connected respectively to two fine setting knobs, can carry out stepless regulation to scale board and pointer position through the fine setting knob, prevent to align excessively or align inadequately.
Preferably, the spectacle frame is provided with a reference pointer for measuring the interpupillary distance of a single eye, the reference pointer and the scale plate are positioned on the same side of the spectacle frame, and the reference pointer corresponds to the position of the center point of the nose bridge of the measured person. Because the interpupillary distance of a lot of people's eyes is asymmetric during, especially squinting patient's binocular interpupillary distance difference is bigger, need carry out the monocular measurement, this scheme accessible of adoption reads the scale that left/right side linear alignment structure corresponds to and the monocular interpupillary distance of left/right eye is known to the scale that the reference pointer corresponds, and the convenience is measured or the monocular measurement according to concrete condition binocular.
Preferably, the picture frame is equipped with still to be used for sheltering from the separation blade of viewport, the viewport forms the inserted hole that is used for the separation blade to insert at picture frame upper end or side for measure near pupil distance, need not measurand initiatively to close the eye, also need not articles such as the handheld sunshade of measurand to cover measurand glasses, it is more convenient to use.
Preferably, a head support for supporting the head of the measured person is further arranged, so that the head of the measured person is kept stable, and the influence on the measurement operation caused by the head shaking is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a fast interpupillary distance measuring device according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of the eyeglass frame in the present embodiment.
Fig. 3 is a schematic structural diagram of the distance measuring unit in this embodiment.
Fig. 4 is a schematic structural diagram of the alignment member in this embodiment.
Fig. 5 is a schematic view of the engagement between the blocking piece and the frame in this embodiment.
Fig. 6 is a schematic view of the usage of the frame in this embodiment.
Fig. 7 is a schematic diagram of the usage of the present embodiment.
Reference numerals: 1. a mirror frame; 10. a viewport; 11. a measuring mechanism; 110. a base; 111. an alignment member; 1110. a support; 1111. linear alignment structures/thin lines; 112. a distance measuring member; 1120. a scale plate; 1121. a pointer; 113. finely adjusting a knob; 12. an insertion opening; 13. referencing a pointer; 2. a reference light source; 20. a back plate; 21. a point light source; 3. a distance adjusting mechanism; 30. a slide bar; 31. a slider; 4. a head rest; 5. a baffle plate.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The fast pupil distance measuring apparatus shown in fig. 1 includes a frame 1, a reference light source 2, a distance adjusting mechanism 3 for adjusting the distance between the reference light source 2 and the frame 1, and a head rest 4.
The reference light source 2 comprises a back plate 20 and three point light sources 21, the point light sources 21 are arranged on one surface of the back plate 20 facing the mirror frame 1, one point light source 21 is located in the middle of the back plate 20, the other two point light sources 21 are respectively located on two sides of the point light source 21 in the middle, the point light sources 21 can be reflected in pupils of a measured person to form light points, the point light sources 21 can flicker, and the interpupillary distance can be obtained by measuring the light points in the two pupils.
The back plate 20 is in a single color, so that the attraction of the surrounding environment can be reduced as much as possible, the point light source 21 is highlighted, the tested person can naturally watch the point light source 21, and a condition is provided for measuring the interpupillary distance.
As shown in fig. 2 to 6, the frame 1 is provided with two viewing ports 10 and a measuring mechanism 11 for measuring the interpupillary distance, the measuring mechanism 11 including a base 110, two aligning members 111 for aligning the measuring points in the pupil, and a distance measuring member 112 for measuring the distance between the two aligning members 111.
The alignment member 111 comprises a bracket 1110 and a linear alignment structure 1111, the linear alignment structure 1111 is a vertically tightened thin line 1111, a notch is reserved on the lower side of the base 110 for the bracket 1110 and the thin line 1111 to pass through, the distance measuring member 112 comprises a scale plate 1120 and a pointer 1121, the scale plate 1120 and the pointer 1121 are both connected with the base 110 in a sliding manner, the pointer 1121 is tightly attached to the scale plate 1120 and can slide relative to the scale plate 1120, the bracket 1110 of one alignment member 111 is fixedly connected with the scale plate 1120, the thin line 1111 of the alignment member 111 is aligned with the zero scale line of the scale plate 1120, the bracket 1110 of the other alignment member 111 is fixedly connected with the pointer 1121, and the thin line 1111 of the alignment member 111 is aligned with the pointer 1121.
The base 110 is provided with a fine adjustment structure for adjusting the positions of the scale plate 1120 and the pointer 1121, the fine adjustment structure is composed of two fine adjustment knobs 113, the two fine adjustment knobs 113 are respectively arranged on two sides of the base 110, the two fine adjustment knobs 113 are respectively connected with the scale plate 1120 and the pointer 1121, and the positions of the scale plate 1120 and the pointer 1121 can be adjusted steplessly through the fine adjustment knobs 113, so that excessive or insufficient alignment is prevented.
The front surface of the spectacle frame 1 is further provided with a reference pointer 13 for measuring the pupil distance of a single eye, the reference pointer 13 corresponds to the position of the central point of the nose bridge of the measured person, the pupil distance of the single eye is the distance from the center of the pupil of the left eye or the right eye to the central point of the nose bridge, and the pupil distance of the single eye of the left eye or the right eye is obtained by reading the scale corresponding to the left/right side linear alignment structure 1111 and the scale corresponding to the reference pointer 13.
The picture frame 1 still is equipped with the separation blade 5 that is used for sheltering from viewport 10, and viewport 10 forms the inserted hole 12 that is used for separation blade 5 to insert at picture frame 1 upper end or side for measure near-using interpupillary distance, need not measurand initiatively to close the eye, also need not articles such as the handheld sunshade of measurand shelter from measurand glasses, and it is more convenient to use.
As shown in fig. 1 and 7, the distance adjusting mechanism 3 includes a horizontally disposed sliding rod 30 and a sliding block 31 capable of sliding on the sliding rod 30, scales are disposed on the sliding rod 30, the back plate 20 is fixedly connected with the upper portion of the sliding block 31, and the sliding block 31 drives the back plate 20 to move synchronously.
Specific manner of use (as shown in fig. 6 and 7):
1. measuring distance of pupil
(1) The tested person wears the picture frame 1, the chin is placed on the head support 4, and the separation blade 5 is inserted to shield the left eye;
(2) opening the point light source 21 in the middle to make the right eye of the tested person watch the point light source 21, and reflecting the point light source 21 to form a light spot in the middle of the right pupil;
(3) fine adjustment knob 113, which is attached to dial 1120, is adjusted so that fine line 1111 is aligned with the spot in the pupil;
(4) reading the scale corresponding to the reference pointer 13 to obtain the pupil distance of the right eye;
(5) taking down the baffle 5 of the left eye, and inserting the baffle 5 to shield the right eye;
(6) adjusting a fine adjustment knob 113 coupled to the pointer 1121 so that the thin thread 1111 is aligned with the light spot in the left eye pupil;
(7) the pupil distance of the left eye of the subject can be obtained by reading the corresponding scale of the pointer 1121 and subtracting the corresponding scale of the reference pointer 13.
(8) The pupil distance for the left eye and the pupil distance for the right eye are added to obtain the pupil distance for the far eyes.
2. Near pupil distance measurement
(1) The tested person wears the picture frame 1, the chin is placed on the head support 4, and the separation blade 5 is inserted to shield the right eye;
(2) the slide block 31 is adjusted to the 40cm scale of the slide rod 30;
(3) turning on the point light source 21 on the left eye side;
(4) the left eye orthophoto point light source 21 adjusts the left fine adjustment knob 113 to make the thin line 1111 aim at the light spot in the pupil and reads the scale corresponding to the thin line 1111;
(5) reading the scale corresponding to the reference pointer 13 and subtracting the scale read in the step (4) to obtain the pupil distance of the left eye;
(6) the baffle 5 is pulled out to shield the left eye;
(7) turning off the point light source 21 on the left eye side and then turning on the point light source 21 on the right eye side;
(8) the right eye emmetropic point light source 21 adjusts the right fine adjustment knob 113 to make the thin line 1111 aim at the light spot in the pupil, and the scale of the reference pointer 13 is read at this time, which is the pupil distance of the right eye of the subject.
(9) The pupil distance for the left eye and the pupil distance for the right eye are added to obtain the pupil distance for the near eyes.
The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (9)
1. A rapid interpupillary distance measuring device is characterized in that: comprises a picture frame (1), a reference light source (2) and a distance adjusting mechanism (3) for adjusting the distance between the reference light source (2) and the picture frame (1),
-the reference light source (2) is a point light source, and the reference light source (2) can flash and/or emit light with different colors;
-the frame (1) is provided with two view ports (10) and a measuring mechanism (11) for measuring the interpupillary distance, the measuring mechanism (11) comprising two aligning members (111) for aligning the measuring points in the pupil and a distance measuring member (112) for measuring the distance of the two aligning members (111);
-the distance adjusting mechanism (3) comprises a horizontally arranged sliding rod (30) and a sliding block (31) capable of sliding on the sliding rod (30), the sliding rod (30) is provided with scales, and the reference light source (2) and the sliding block (31) move synchronously.
2. The fast interpupillary distance measuring device of claim 1, wherein: the reference light source (2) comprises a back plate (20) and at least one point light source (21), the back plate (20) adopts a single color, and the point light source (21) is arranged on the side surface of the back plate (20) facing the mirror frame (1).
3. The fast interpupillary distance measuring device of claim 1, wherein: the measuring mechanism (11) further comprises a base (110), the alignment part (111) comprises a support (1110) and a linear alignment structure (1111), the linear alignment structure (1111) is vertically arranged and located in front of the viewport (10), the distance measuring part (112) comprises a scale plate (1120) and two pointers (1121), the scale plate (1120) is arranged on the base (110), the supports (1110) of the two alignment parts (111) are respectively connected with one pointer (1121), and the pointers (1121) are connected with the base (110) in a sliding mode.
4. The fast interpupillary distance measuring device of claim 1, wherein: the measuring mechanism (11) further comprises a base (110), the aligning pieces (111) comprise brackets (1110) and linear aligning structures (1111), the distance measuring piece (112) comprises a scale plate (1120) and a pointer (1121), the scale plate (1120) and the pointer (1121) are both connected with the base (110) in a sliding mode, the bracket (1110) of one aligning piece (111) is fixedly connected with the scale plate (1120), the linear aligning structures (1111) of the aligning piece (111) are aligned with zero scale marks of the scale plate (1120), the bracket (1110) of the other aligning piece (111) is fixedly connected with the pointer (1121), and the linear aligning structures (1111) of the aligning piece (111) are aligned with the pointer (1121).
5. The fast interpupillary distance measuring device of claim 4, wherein: the base (110) is provided with a fine adjustment structure for adjusting the positions of the scale plate (1120) and the pointer (1121).
6. The fast interpupillary distance measuring device of claim 5, wherein: the fine adjustment structure comprises two fine adjustment knobs (113), the two fine adjustment knobs (113) are respectively arranged on two sides of the base (110), and the two fine adjustment knobs (113) are respectively connected with the scale plate (1120) and the pointer (1121).
7. The fast interpupillary distance measuring device of claim 4, wherein: the spectacle frame (1) is provided with a reference pointer (13) for measuring the interpupillary distance of a single eye, the reference pointer (13) and the scale plate (1120) are positioned on the same side of the spectacle frame (1), and the reference pointer (13) corresponds to the position of the center point of the nose bridge of a measured person.
8. The fast interpupillary distance measuring device of claim 1, wherein: the picture frame (1) is also provided with a baffle plate (5) for shielding the view port (10), and the view port (10) forms an insertion opening (12) for inserting the baffle plate (5) at the upper end or the side edge of the picture frame (1).
9. The fast interpupillary distance measuring device of claim 1, wherein: a head support (4) for supporting the head of the tested person is also arranged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011545901.0A CN112716444B (en) | 2020-12-23 | 2020-12-23 | Quick pupil distance measuring device |
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|---|---|---|---|
| CN202011545901.0A CN112716444B (en) | 2020-12-23 | 2020-12-23 | Quick pupil distance measuring device |
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| CN112716444B CN112716444B (en) | 2022-12-20 |
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