Calibration of the Terry keratometer.
D001251:Astigmatism / Q000517:prevention & control; D002138:Calibration; D002387:Cataract Extraction / Q000009:adverse effects; D006801:Humans; D007430:Intraoperative Care; D009885:Ophthalmology / Q000295:instrumentation*; D013536:Suture Techniques / Q000295:instrumentation*