A recording retinoscope was developed to measure the luminance of the fundus reflex during problem-solving tasks. 10 students were used as subjects. The luminance of the reflex was recorded while the subjects read 5 passages of graded reading material and performed an addition task. A reversal design was used to determine the effects of pupil changes and accommodation on changes in the luminance of the reflex. Relatively large changes in the luminance of the reflex were recorded. These were due to accommodation. The subjects' comprehension of the reading material did not appear to affect the luminance of the reflex in the manner predicted by previous studies. However, a change in task from simple reading material to an addition task appeared to increase the luminance of the reflex.
*Read before the Section on Refraction at the Annual Meeting of the American Academy of Optometry, Miami Beach, Florida, December 17, 1974. For publication in the December, 1975 issue of the AMERICAN JOURNAL OF OPTOMETRY AND PHYSIOLOGICAL OPTICS.
†Optometrist, M.S., Member of Faculty;
Fellow, American Academy of Optometry
AUTHOR'S ADDRESS: Dr. Philip B. Kruger College of Optometry State University of New York 122 East 25th Street New York, New York 10010
© 1975 American Academy of Optometry