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.
Department of Physics, University of Otago.
I J
IJ
Hodgkinson
N J
NJ
Bosma
A C
AC
Molteno
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