Pediatric vision screening using binocular retinal birefringence scanning

Deborah S. Nassif; Boris Gramatikov; David L. Guyton; David G. Hunter

doi:10.1117/12.477970

14 July 2003 Pediatric vision screening using binocular retinal birefringence scanning

Deborah S. Nassif, Boris Gramatikov, David L. Guyton, David G. Hunter

Proceedings Volume 4951, Ophthalmic Technologies XIII; (2003) https://doi.org/10.1117/12.477970
Event: Biomedical Optics, 2003, San Jose, CA, United States

Abstract

We have developed a specialized form of retinal birefringence scanning (RBS), in which a small spot of polarized light is scanned in a circle on the retina, and the returning light is measured for the changes in polarization cuased by the pattern of birefringent fibers that radiate from the fovea. Binocular RBS (BRBS) detects fixation of both eyes simultaneously and thus screens for strabismus, one of the risk factors of amblyopia. We have also developed a technique to automatically detect when the eye is in focus without measuring refractive error. This focus detector utilizes a bull's eye photodetector optically conjugate to a point fixation source. Reflected light is focused back to the point source by the optical system of the eye and if the subject focuses on the fixation source, the returning light will be focused on the detector. We have constructed a hand-held prototype combining BRBS and focus detection measurements in one quick (<0.5 second) and accurate (theoretically detecting ±1° of misalignment) measurement. Here we present our data of BRBS and focus detection signals in a number of normal and amblyopic subjects, demonstrating that this approach can reliably and effectively identify children at risk for amblyopia.

Citation Download Citation

Deborah S. Nassif, Boris Gramatikov, David L. Guyton, and David G. Hunter "Pediatric vision screening using binocular retinal birefringence scanning", Proc. SPIE 4951, Ophthalmic Technologies XIII, (14 July 2003); https://doi.org/10.1117/12.477970

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available