Keratometer, colour white or black

A keratometer is a medical device used to measure the curvature of the anterior surface of the cornea, which is the clear, dome-shaped surface that covers the front of the eye. This instrument is particularly useful in assessing the shape of the cornea before procedures such as fitting contact lenses or planning refractive surgeries like LASIK. By measuring the curvature of the cornea, a keratometer helps eye care professionals determine the appropriate prescription for corrective lenses or the feasibility of refractive surgery.