Characterization of the fundal reflectance of infants.
Pupillary images recorded by a linear knife-edge photoscreener for infants accommodating more or less within the bounds of chromatic aberration show three smooth offset pupillary irradiance ramps when analyzed with a color video camera and frame-grabbing hardware. Both the shape of the ramps and the lack of a second image in a shadowing experiment support the view that the retina acts as an angularly diffuse partial reflector in photorefraction. We propose a lateral image-spreading characteristic to account for observed color-dependent ramp heights and offsets and consider possible physical mechanisms for lateral spreading.
Department of Physics, University of Otago, Dunedin, New Zealand.
I J
IJ
Hodgkinson
K M
KM
Chong
A C
AC
Molteno
D002675:Child, Preschool; D005654:Fundus Oculi; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008027:Light; D012025:Reflex, Pupillary; D012160:Retina / Q000502:physiology*; D014787:Vision Tests / Q000379:methods