Scanning laser ophthalmoscopy: optimized testing strategies for psychophysics

Frans J. Van de Velde M.D.

doi:10.1117/12.260859

5 December 1996 Scanning laser ophthalmoscopy: optimized testing strategies for psychophysics

Frans J. Van de Velde M.D.

Proceedings Volume 2930, Lasers in Ophthalmology IV; (1996) https://doi.org/10.1117/12.260859
Event: BiOS Europe '96, 1996, Vienna, Austria

Abstract

Retinal function can be evaluated with the scanning laser ophthalmoscope (SLO). the main advantage is a precise localization of the psychophysical stimulus on the retina. Four alternative forced choice (4AFC) and parameter estimation by sequential testing (PEST) are classic adaptive algorithms that have been optimized for use with the SLO, and combined with strategies to correct for small eye movements. Efficient calibration procedures are essential for quantitative microperimetry. These techniques measure precisely visual acuity and retinal sensitivity at distinct locations on the retina. A combined 632 nm and IR Maxwellian view illumination provides a maximal transmittance through the ocular media and has a animal interference with xanthophyll or hemoglobin. Future modifications of the instrument include the possibility of binocular evaluation, Maxwellian view control, fundus tracking using normalized gray-scale correlation, and microphotocoagulation. The techniques are useful in low vision rehabilitation and the application of laser to the retina.

Citation Download Citation

Frans J. Van de Velde M.D. "Scanning laser ophthalmoscopy: optimized testing strategies for psychophysics", Proc. SPIE 2930, Lasers in Ophthalmology IV, (5 December 1996); https://doi.org/10.1117/12.260859

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