Which technique is used to measure the curvature of the cornea?

The technique used to measure the curvature of the cornea is keratometry. This process involves using a keratometer, which is an instrument designed specifically to assess the curvature of the anterior surface of the cornea. The curvature of the cornea is crucial in optometry as it plays a significant role in determining the refractive power of the eye, impacting vision correction needs such as glasses or contact lenses.

Keratometry measures the radii of curvature of the cornea by projecting a series of mires – concentric rings or dots – and analyzing how they are reflected off the corneal surface. The data gathered helps in diagnosing and managing various ocular conditions and is particularly essential in contact lens fitting and refractive surgery evaluations.

Other techniques listed serve different purposes: optometry refers broadly to the profession and not a specific measurement technique, sphygmomanometry is used to measure blood pressure, and autorefraction assesses the refractive error of the eye but does not measure corneal curvature directly. Understanding these distinctions highlights the importance of keratometry in eye care practice.