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Abstract
Abstract
Qualitative Comparison of the Glaucomatous Optic Nerve Head Atrophy Using Conventional Digital 2D Photography and Stereophotography
Lehmann M. V.1, Mardin C. Y.1, Lausen B.2, Bergua A.1
1Department of Ophthalmology und 2Institute of Medical Statistics of the University Erlangen-Nürnberg, Erlangen
Purpose: Real color documentation of the optic nerve head (ONH) is one of the most important methods to identify the chronical course of glaucomatous optic nerve damage. This study compared qualitatively the evaluation of ONH photographies using a time-multiplexing system (wireless liquid crystal shutter glasses) in 3D to the conventional 2D photography, visualized on a computer monitor.
Method: Twelve 15° stereoscopic images from the Erlangen Glaucoma Register were scanned by a SprintScan 35 Plus Film scanner (Polaroid, MA) in jpeg format (2D) and then converted by a special software (3D-PIX, Nuvision) in jps (3D). The same ONH images were shown in 2D and in 3D on a computer monitor to 22 subjects with different training grades (12 assistant doctors, 10 ophthalmologists). A standardized questionnary evaluated semiquantitative parameters like ONH stage, neuroretinal rim (NRR) configuration, parapapillary atrophy and depth of cup.
Results: A significant better evaluation of the glaucomatous ONH atrophy using the stereoscopic method was achieved for the following parameters: NRR (p-value=0.0171), depth of cup (p-value=0.0001) and visibility of retinal nerve fibre laye