Corneal Thickness Normal corneal thickness is about 540 microns (half of a millimeter). Thickness is checked with a handheld ultrasound device called a pachymeter. Why Doctor may ask for this Exam? Eye Doctor may ask this test for the following cases:
What will happen during this Exam? In the test a local anesthetic drop is installed in each eye and a pohe touches each cornea to get the measurement. How much time does it takes? This test may takes 2-3 minutes.
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