What practice is used to measure the thickness of the cornea?

Pachymetry is the specific practice used to measure the thickness of the cornea. This procedure is essential in various ophthalmic assessments, particularly in the evaluation of conditions such as glaucoma, where corneal thickness can influence intraocular pressure readings.

Pachymeters can utilize ultrasound technology or optical coherence tomography to provide precise measurements of the cornea. Knowledge of corneal thickness is vital for determining risk factors for eye diseases, planning surgical procedures like LASIK, and monitoring changes over time.

The other practices mentioned serve different purposes: tonometry measures intraocular pressure, visometry assesses visual acuity, and biometry involves measuring the eye for lens implant calculations or assessing other dimensions of the eye. Each of these has its own significance in ophthalmology but does not pertain directly to corneal thickness measurement like pachymetry does.