Further instrument developments at the ophthalmology research laboratory:  a voltage regulator for electronic instruments; a special interval timing unit; an improved surgical galvanic unit; a flashlight without batteries.
D004389:Durable Medical Equipment; D011211:Electric Power Supplies; D006801:Humans; D009885:Ophthalmology / Q000295:instrumentation*; D012106:Research
OPHTHALMOLOGY/apparatus and instruments