What is the name of the instrument used to measure the thickness of the cornea?

The instrument specifically designed for measuring the thickness of the cornea is called a pachymeter. This tool is crucial in ophthalmology, particularly for assessing corneal conditions and for preoperative evaluations in procedures such as LASIK surgery. Accurate measurements of corneal thickness are essential for diagnosing corneal diseases, managing glaucoma, and determining the appropriate treatment for various ocular conditions.

Other instruments mentioned serve different purposes: tonometry measures intraocular pressure, ophthalmoscopes are used to examine the interior of the eye including the retina, and retinoscopes assess refractive error by measuring how light reflects off the retina. Each of these tools is important in the field of ophthalmology, but none are designed for measuring corneal thickness like the pachymeter.