Biostereometrics in Ophthalmology: Topographic Analysis of the Optic Disc Cup in Glaucoma

Takenori Takamoto; Bernard Schwartz

doi:10.1117/12.956316

7 July 1986 Biostereometrics in Ophthalmology: Topographic Analysis of the Optic Disc Cup in Glaucoma

Takenori Takamoto, Bernard Schwartz

Proceedings Volume 0602, Biostereometrics '85; (1986) https://doi.org/10.1117/12.956316
Event: 1985 International Technical Symposium/Europe, 1985, Cannes, France

Abstract

Glaucoma is a disease characterized by increased ocular pressure with optic nerve atrophy and loss of visual field, or side vision, which eventually leads to blindness. The optic disc becomes more cupped with increasing progress of the disease. We have devised a system for the use of the Donaldson simultaneous stereophotographic fundus camera to obtain optimal reproducibility and sensitivity of measurements from optic disc stereophotographs. Stereomodel deformations caused by eye-to-camera optical variables (photographic magnification, working distance, relative orientation between the camera optical axis and the optic disc, and position of the optic disc image in the film frame) were evaluated. We developed an analytical correction method for stereomodel deformations and evaluated the impact on measurement of optic disc cupping. We have evaluated the reproducibility of new techniques for measurement of cup parameters such as volume, depth, and area of the cup relative to the disc area; slope of the cup floor, wall, and rim; and cup shape using volume profiles in which contour areas were plotted of the cup depth from the top to the bottom.

Citation Download Citation

Takenori Takamoto and Bernard Schwartz "Biostereometrics in Ophthalmology: Topographic Analysis of the Optic Disc Cup in Glaucoma", Proc. SPIE 0602, Biostereometrics '85, (7 July 1986); https://doi.org/10.1117/12.956316

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