Ophthalmic Assistant

Category - Keratometry, Tonometry, and Refractometry

To ensure accuracy, the keratometer must be
  1. periodically calibrated.
  2. properly maintained.
  3. protected from dust.
  4. all of the above.
Explanation
Answer: D - all of the above.

To ensure accuracy, the keratometer must be periodically calibrated, properly maintained, and protected from dust.
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