Pupillary irradiance distributions for light backscattered in the human eye.
An investigation of linear knife-edge photoscreening devices for detecting focusing errors, refractive defects and other optical artifacts in the human eye is described. Pupillary irradiance distributions calculated for a model eye are shown to agree qualitatively with distributions recorded experimentally using video frame grabbing equipment. The form of the pupillary irradiance distribution from a cyclopleged human eye supports a diffuse-like characterization for the reflection/scattering processes at the retina. The extreme sensitivity of the instruments enables real-time detection of refractive effects from tear films on the cornea and real-time tracking of floaters.
Hodgkinson
I J
IJ
Department of Physics, University of Otago.
Khoo
B C
BC
Lunt
B J
BJ
Molteno
A C
AC
D005128:Eye Diseases / Q000175:diagnosis*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007223:Infant; D008027:Light; D008403:Mass Screening / Q000295:instrumentation*; D008954:Models, Biological; D009885:Ophthalmology / Q000295:instrumentation*; D055095:Optics and Photonics; D011680:Pupil / Q000502:physiology*; D012542:Scattering, Radiation; D014743:Videotape Recording