Optician Practical Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What does a keratometer measure?

The overall shape of the eye

The curvature of the cornea

A keratometer is specifically designed to measure the curvature of the cornea, which is the clear, dome-shaped surface that covers the front of the eye. This measurement is crucial for various applications, including the fitting of contact lenses and assessing the eye's overall health. By determining the curvature, practitioners can better understand how light is refracted as it enters the eye, which directly influences visual acuity.

While the overall shape of the eye, the thickness of the lens, and the clarity of the lens are important factors in ocular health, they are not the primary focus of what a keratometer measures. The device specifically provides readings that aid in understanding and correcting corneal irregularities or astigmatism, making it an essential tool in optometry and ophthalmology.

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The thickness of the lens

The clarity of the lens

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