What type of lens measurement is affected by a change in the cornea's curvature?

The correct response pertains to keratometry, a specific measurement that directly assesses the curvature of the cornea. This technique is crucial in determining how light refracts through the eye and helps in fitting contact lenses appropriately.

When the curvature of the cornea changes—whether due to natural variations, disease, or following surgical procedures—keratometry measurements will reflect those changes. These measurements are typically obtained using a keratometer, which projects light onto the cornea and measures the reflection to ascertain the corneal curvature.

While refraction does involve assessing how light bends as it passes through the eye, it is influenced by both the shape of the cornea and the lens system of the eye but does not specifically measure corneal curvature. Topography provides a comprehensive mapping of the corneal surface but is more detailed than what keratometry quantifies. A slit-lamp examination is primarily used for observing the anterior segment of the eye and is not intended for measuring corneal curvature directly.