Effect of Visual Retraining on Visual Loss Following Visual Cortical Damage

A computer software and chin-rest necessary to perform visual training will be loaned to each subject to be used at home. Subjects will perform one to two daily training sessions in their home, consisting of 200-300 trials each. The visual task performed repetitively will involve discriminating the direction of motion, the presence of motion, or the orientation of a visual stimulus (either a small cloud of dots or bars) located at a predetermined location in the blind field. The computer program will automatically create a record of patient performance during each home training session. Subjects will train daily (about 40-60 minutes total), 5 to 7 days per week for at least 3 and up to 12 months at a time.

This training will take place in lab at the University of Rochester Medical Center. Subject will perform one daily training session, consisting of 200-300 trials each. The visual task performed repetitively will involve discriminating the direction of motion, the presence of motion, or the orientation of a visual stimulus (either a small cloud of dots or bars) located at a predetermined location in the visual field. The computer program will automatically create a record of patient performance during each training session. Subjects will train daily (about 30-40 minutes total), 5 to 7 days per week for at 7 - 14 days.