A Modified Amsler Grid, the size of a conventional credit card, has been developed as a suitable alternate to the full-scale version. The size of the grid makes it extremely convenient for patients in our highly mobile society. When viewed twice (vertically and horizontally), it corresponds well to the topography of the central macula. In this capacity the Modified Amsler Grid is a useful adjunct to the overall management of patients with macular diseases which may potentially be associated with exudative manifestations.