Visual prognosis for corneal transplantation based on preoperative visual evoked potential and electroretinogram.

Thirty-one corneal transplant cases underwent a visual-evoked potential and electroretinogram examination prior to keratoplasty. There were 12 cases that had a good visual prognosis and 19 cases with a poor visual prognosis based on the preoperative diagnosis and clinical examination. The addition of electrophysiologic testing in the good prognosis cases did not provide additional information, but produced one false negative, whereas tests in poor prognosis cases were helpful in predicting the visual outcome after transplant. These tests were predictive of visual outcome in 71% of all cases and in 58% of the poor prognosis group.