What is the mean keratometry reading derived from 43 and 43.50?

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Multiple Choice

What is the mean keratometry reading derived from 43 and 43.50?

Explanation:
Mean keratometry is the average of two readings. Add 43 and 43.50 to get 86.50, then divide by 2 to get 43.25. So the mean keratometry is 43.25 diopters, which sits between the two measurements.

Mean keratometry is the average of two readings. Add 43 and 43.50 to get 86.50, then divide by 2 to get 43.25. So the mean keratometry is 43.25 diopters, which sits between the two measurements.

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