Chromatic analysis of photorefraction: a model for the Otago photoscreener.
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.
Hodgkinson
I J
IJ
Department of Physics, University of Otago.
Bosma
N J
NJ
Molteno
A C
AC
D000065:Accommodation, Ocular / Q000502:physiology; D000550:Amblyopia / Q000175:diagnosis; D002648:Child; D004867:Equipment Design; D006801:Humans; D008954:Models, Biological; D009885:Ophthalmology / Q000295:instrumentation*; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000175:diagnosis*; D013285:Strabismus / Q000175:diagnosis