Cryosurgery instrumentation.
D002387:Cataract Extraction / Q000295:instrumentation; D003452:Cryosurgery / Q000295:instrumentation*; D004553:Electric Conductivity; D005128:Eye Diseases / Q000601:surgery; D005615:Freezing; D006358:Hot Temperature; D007498:Iris / Q000601:surgery; D009584:Nitrogen; D012163:Retinal Detachment / Q000601:surgery; D013525:Surgical Instruments
D009584:Nitrogen