Phase 1 In the first phase, we will determine the validity and reliability of Functional Outcome Measure by applying the Functional Outcome Measure to 20 subjects with homonymous visual field defects (VFD) due to a stoke, 20 stroke cases without visual field defects and 20 normal individuals. They will be asked to perform the Functional Outcome Measure a second time within the following 1-2 weeks in order to evaluate test-retest reliability. The expectation is that those without VFD (stroke and normal individuals) will have good or excellent results on the Functional Outcome Measure, while those with VFD will have abnormal results, thus reflecting the ability of this instrument to record the impairment present in those with VFD. In addition, it is anticipated that the results will be similar after retesting, ensuring test-retest reliability. An interim analysis will determine if the instrument is valid and if all its components correlate with the magnitude of visual field loss (as measured by High Resolution perimetry). Once the validation of the instrument has been accomplished, the functional outcome measure will be amended as suggested by this analysis to include only the items that correlate well with VFD.