Visual acuity was psychometrically measured over a wide range of luminances for four amblyopes to explore the contention that amblyopic eyes improve in acuity in dim light and have an acuity equal to or better than the normal eye. In our experiment, acuity of the amblyopic eyes did not improve with low luminance but declined as for the normal eyes. At essentially all luminances, acuity of the amblyopic eye was less than that of the normal eye, and at the lowest luminances both eyes approximated each other in acuity.
*Read before the Annual Meeting of the American Academy of Optometry, Chicago, December 9, 1967. For publication in the March, 1969, issue of the American Journal of Optometry and Archives of American Academy of Optometry.
This investigation supported in part by a grant (NB-4242) from the National Institute of Neurological Diseases and Blindness, U.S. Public Health Service, Washington, D.C.
†Optometrist, M.Optom., Member of Faculty. Fellow, American Academy of Optometry.
‡Optometrist, Ph.D., Member of Faculty, Principal Investigator. Fellow, American Academy of Optometry.
© 1969 American Academy of Optometry