An procedure used to measure the thickness of the cornea.
measurement of the thickness of the cornea, using a small ultrasound instrument. The thickness of the corneaaffects the pressure: a thicker than average cornea may give an artificially high pressure reading.
Measures corneal thickness. Since Lasik corrects vision by removing a thin layer of corneal tissue, this measurement verifies the safety of the procedure for each patient.
Optical or ultrasonic procedure to measure the corneal thickness
A precise technique for measuring the exact thickness of the cornea
(Gr. pachy =thick, thickness + L. meter =instrument used in measurement) Measuring of the thickness of the cornea with ultrasound machine. The purpose of measuring is to determine the thickness of the cornea prior to PRK or LASIK treatment, so as not to exceed the maximum treatment depth. In RK the radial cuts are usually set at 90% of the depth (thickness). PRK and LASIK treatment depths are dependent upon the ablation diameter. For more information please refer to Table of Ablation Depth vs. Diopters & Diameter of Optical Zone.
The process of measuring corneal thickness, usually using an ultrasonic probe.
The use of an instrument to measure the thickness of the cornea.