Date of Award


Degree Type


Degree Name

Master of Science in Vision Science

Committee Chair

Niles Roth, O.D., Ph.D.

Second Advisor

Paul Kohl, O.D.


This is an experimental study of a photoretinoscopic apparatus based on the Badal optometer principle. The experimental set-up consisted of a two-element object array, +13.375 D input lens, +1.875 D intermediate lens, and +2.00 D output lens. An emmetropic human eye analogue was used to test the accuracy of the apparatus. One of the image sizes in the eye analogue was 20% larger than the other showing some departure from the Badal configuration, possibly due to errors in setting up optics for confocal relations. There is also a need for greater flux uniformity of the light source, and better quality lenses, so as to reduce aberrations, thereby enhancing resolution.

Included in

Optometry Commons