Amblyopia

dimness of vision from defective sensibility of the retina. A condition inwhich there is a possibility of restoring theformer vision; for instance, when a person has an error of refraction in one eye, the other eyebeing emmetropic, he will learn to ignore the eye with the error, and use the one with the best vision. In this way the sight will become dim from want of use, and is an acquired state,which by testing with ihe pinhole disc will showno improvement. Under these conditions, the error must be corrected with the retinoscope. and if the eyes are not more than two dioptrics apart, instruct your patient always to wear his correction and cover the good eye two or three times a day, for a period of ten minutes at atime, and try to use the amblyopic eye. In thisw^ay you will notice an improvement of visioneach week. When the pinhole disc fails to improve vision, the eye is either amblyopic or in a diseased state.

Source: Ophthalmic Dictionary including pronunciation, derivation and definition of the words used in Optometry and Ophthalmology by James J. Lewis, Oph. D. Professor of Optometry in the Northern Illinois College of Ophthalmology and Otology, Chicago.