With this pocket sized Amsler Grid Eye Test Card, the patient can self check for visual irregularites, increasing the probability of early detection and early treatment of macular degeneration. Amsler Grid General Instructions: When prescribed, cover one eye and look at the white square in the center of the chart with the other. If any of the lines appear wavy, distorted, blurred or otherwise irregular, or if a blind spot appears, consult an eye specialist immediately. Give grids out to patients. Especially those patients with dry AMD. These durable small Amsler Grid Cards are the size of regular playing cards. Buy Western's WO-27F Amsler Grid in bulk packs of 50 and save!