Internal retinal biopsy: surgical technique and results.

I have performed an internal retinal biopsy on fourteen patients. The technique involves the use of vitrectomy instrumentation endodiathermy, endolaser and vitreous scissors to remove a 1-2 mm2 area of the diseased retina. Endolaser photocoagulation and air-fluid exchange with and without the use of silicone oil conclude the surgery. No significant postoperative complication has been noted in patients undergoing this procedure.