Optimising Visual Acuity Measurement in Macular Degeneration

Those subjects who meet the inclusion criteria will undergo the study tests. These measurements will be performed on one eye only. Visual acuity will be quantified using two forms of the MAC chart (MAC 1 and 2) and two forms of a conventional letter design chart (C1 and 2). Contrast sensitivity will be measured using the two forms of the Pelli-Robson chart (CS1 and CS2). The order with which the test charts will be presented, in addition to the charts used (i.e. MAC 1 or 2, C1 or 2, and CS1 or 2), will be selected at random. Finally, a measurement of eye length will be collected using an IOL Master (Carl-Zeiss Meditec, USA).