July 4, 2012 | POSTED BY | Clinical Pearls

The average corneal steepness is about 43.00 Diopters to 44.00 Diopters. If the mires are not clear and regular, ask the patient to blink five or six times because an evaporating tear film can affect your readings. Also direct the patient to look at a single point inside the keratometer; doing this will keep their eyes from moving which will also affect your readings.

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