Method and graphic to achieve optimal lens correction for subnormal

Abstract

Patients suffering severe retinal damage and focusing impairment are tested in an area having actual or simulated outdoor illumination by viewing a graphic having colored familiar objects and letters of graduated incremental sizes thereon with colored backgrounds either darker or lighter than the objects and letters involved to ascertain the patient's estimated optimal correction for distance vision. Based on said estimate, the patient is provided with a combination of a soft contact lens between the estimated correction and a correction obtained by traditional testing methods using black letters against a white background in a darkened room, and a plurality of spectacle type lenses in incremental diopter corrections of two or three diopters for training purposes. The patient trains for about twelve weeks using such combination indoors and outdoors whereby the soft contact lenses are worn and the patient views successively through different diopter lenses to improve focusing ability and perception and to arrive at a final optimal correction for soft contact lenses and further spectacle type lenses to be used for reading. During the latter period the patient receives supportive therapy which provides detailed information on what the patient should expect and to overcome adverse reactions which may occur incident to the method. Improved soft contact lens prescriptions are also possible for patients having normal retinas by using the disclosed graphic and vision testing method.