Improvements on Littmann's method of determining the size of retinal features by fundus photography
Volume: 232, Issue: 6, Pages: 361 - 367
Published: Jun 1, 1994
Abstract
Littmann's formula relating the size of a retinal feature to its measured image size on a telecentric fundus camera film is widely used. It requires only the corneal radius, ametropia, and Littmann's factor q obtained from nomograms or tables. These procedures are here computerized for practitioners' convenience. Basic optical principles are discussed, showing q to be a constant fraction of the theoretical ocular dimension k′, the distance from...
Paper Details
Title
Improvements on Littmann's method of determining the size of retinal features by fundus photography
Published Date
Jun 1, 1994
Volume
232
Issue
6
Pages
361 - 367
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