* Before starting the test, patient's near and distance vision should be corrected to normal. If the patient is wearing spectacles, testing should be done with glasses only especially if you have near glasses. * In a well illuminated room, ask the patient to hold the<unk>  12 to 15 inches away from the face. * Ask to cover one eye with hand or occluder and look directly at the center black dot. * While looking directly at the center dot, and observe the<unk>  whether patient can see all corners and sides of<unk> . If any lines or areas look blurry, wavy, dark or blank mark that area in chart and consult ophthalmologist. * Follow the same steps with the other eye. * Always remember to keep the<unk> ’s Chart at the same distance from the eyes each time you test. * This test can be self done at home also.
Amsler grid
Haller index
Jaeger chart
Challacombe scale
Mentzer index
Monoyer chart
Lund and Browder chart
Barber–Johnson diagram