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To the Editor.
—I would like to comment on the article by Spitznas in the April Archives (1983;101:623-630) entitled "Motorized Teleguided Stereotactic Micromanipulator for Vitreous Microsurgery." This system seems, at the first attempt, to reduce the unavoidable human error in ophthalmic microsurgery. My impression is that the most sorely needed place for instrumentation of this sort is in the field of keratorefractive surgery, specifically, radial keratotomy. The unpredictability and unreliability of radial keratotomy most likely stems mainly from inevitable variations in incision pressure due to the manual technique. It would be most interesting to test in animals the effects of radial keratotomy using a stereotactic micromanipulator similar to that developed by Spitznas. Histologic evaluation of corneas that had undergone mechanically driven incisions would most likely show healed wounds of uniform depth.