Chart is used for younger children and people who can't read. Disposable tissues or disposable eyepatches. Both eyes are tested with and without corrective lenses. Cover one eye, then the other. Both eyes are tested with and without corrective lenses.
Abnormal results call for more sophisticated studies.
Return to pretest activities right away. Corrective lenses that are outdated in their degree of correction. Corrective lenses that were improperly prescribed. M.D. Copyright by Fisher Books. Electronic rights by Medical Data Exchange.