GB677158A - An improved apparatus for testing binocular vision - Google Patents

An improved apparatus for testing binocular vision

Info

Publication number
GB677158A
GB677158A GB3324449A GB3324449A GB677158A GB 677158 A GB677158 A GB 677158A GB 3324449 A GB3324449 A GB 3324449A GB 3324449 A GB3324449 A GB 3324449A GB 677158 A GB677158 A GB 677158A
Authority
GB
United Kingdom
Prior art keywords
images
eyes
observer
target
binocular
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB3324449A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RONALD FIELDING HILL
Original Assignee
RONALD FIELDING HILL
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 RONALD FIELDING HILL filed Critical RONALD FIELDING HILL
Priority to GB3324449A priority Critical patent/GB677158A/en
Publication of GB677158A publication Critical patent/GB677158A/en
Expired legal-status Critical Current

Links

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
    • A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
    • A61B3/08—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing binocular or stereoscopic vision, e.g. strabismus

Landscapes

  • 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)

Abstract

677,158. Sight-testing apparatus. HILL, R. F. Nov. 24, 1950 [Dec. 29, 1949], No. 33244/49. Class 97 (i). Apparatus for testing binocular vision comprises a fixation target arranged to present to the observer, either directly or through a mirror system, a normal binocular projection of a pair of spaced images carried thereby and septum means which can be arranged to dissociate said images, or a similar pair of images carried by the target, with respect to the eyes of the observer whilst allowing both eyes to observe a common confined area between the dissociated images to stimulate the binocular reflexes, whereby a comparison can be obtained between the normal binocular poise of the observer and the binocular poise when the observer's eyes are dissociated. As shown in Fig. 4 a target 9 bearing two identical pairs of images RL is viewed by the observer's eyes 3 by reflection in a mirror comprising a large reflecting area 10 and a small reflecting area 12 limited by non-reflecting areas 11, the edges 11a of which form septa so that each eye views only one image of the lower pair by reflection in the mirror portion 12, together with an area common to the vision of both eyes, while each eye sees both the upper pair of images by reflection in the portion 10. The difference in the two views gives an indication of any defects in the binocular vision of the observer. Alternatively the reflector 12 may be a separate mirror hinged to the mirror 10, the portions 11 being formed as screens movable to vary the extent of the effective reflecting surface. The mirrors 10 and 12 may be relatively inclined so that only one pair of images R and L need be provided on the target 9. In a modification, the target 9 may be directly viewed through a mask 7, Fig. 2, having an area 8 through which the upper images are viewed by both eyes and a slot 8a, the edges 8b of which form septa for dissociating the lower images. The target and mask may be slidable on a rod for relative adjustment.
GB3324449A 1949-12-29 1949-12-29 An improved apparatus for testing binocular vision Expired GB677158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3324449A GB677158A (en) 1949-12-29 1949-12-29 An improved apparatus for testing binocular vision

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3324449A GB677158A (en) 1949-12-29 1949-12-29 An improved apparatus for testing binocular vision

Publications (1)

Publication Number Publication Date
GB677158A true GB677158A (en) 1952-08-13

Family

ID=10350409

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3324449A Expired GB677158A (en) 1949-12-29 1949-12-29 An improved apparatus for testing binocular vision

Country Status (1)

Country Link
GB (1) GB677158A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2281634A (en) * 1993-06-17 1995-03-08 Shapiro Isaac J Testing binocular vision

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2281634A (en) * 1993-06-17 1995-03-08 Shapiro Isaac J Testing binocular vision
GB2281634B (en) * 1993-06-17 1996-04-10 Shapiro Isaac J Testing binocular vision using a chart and optical septum

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