Abstract

The primary purpose of this research is to determine, as accurately as possible, the illuminance distribution across the retina of the eye resulting from a small image formed at the back of the eye by nearly collimated light incident upon the cornea, with the illuminance distribution specified over a wide range, including angles close to the image proper. The measurements are taken by means of a photomultiplier tube located immediately behind a small aperture at the back of an excised steer eye. It is hoped that the results are generalizable to the living, human eye. Consequently, a variety of control studies were undertaken to support the possibility of such a generalization. These include investigations of post mortem changes (including studies with living eyes), use of “normal” vs Maxwellian view, wavelength, pupil diameter, and the shape of the retinal image. Although most of the work was done with excised steer eyes, some data were also taken with eyes from pigs and sheep. The final distribution is similar to, but not exactly the same as, that inferred from psychophysical investigations.

© 1958 Optical Society of America

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