Sir,

We appreciate the interest of Drs Shah and Chalam in our article and thank them for their comments. Our study was a pilot study to examine how the retinal sensitivity measured with the MP-1 correlates with other parameters, such as retinal thickness and visual acuity. From our experience, we feel that the testing conditions should be further modified especially for patients with poor visual acuity. In this study, the age of diabetic patients ranged from 25 to 76 years, and that of the controls from 42 to 76 years, as described in the Subjects and methods section. The reduced sensitivity may be due to the ages of the normal subjects. All tests were performed in a lighted room. In order to obtain more reliable data from patients with poor VA, we used a larger cross for fixation, and allow patients to learn the test. We also appreciate the other suggestions for further studies.