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Chromatic analysis of photorefraction: a model for the Otago photoscreener
I J Hodgkinson1, N J Bosma, A C Molteno
1Department of Physics, University of Otago.
Australasian Physical & Engineering Sciences in Medicine
|September 1, 1994
Abstract:
A model is presented for photorefractive testing of the living eye with the circular knife-edge Otago photoscreener. Wavelength-dependent fundal remittance and line spread functions are introduced and used to account for the yellow-orange-red range of colours observed in pupillary images. The response of the photoscreener to errors of focus is described in terms of luminance and dominant wavelength profiles.