Ultrasound with Measurement of Corneal Thickness - Eye

This test uses sound waves to measure the thickness of the cornea in the eye(s). It is called pachymetry.

This test uses sound waves to measure the thickness of the cornea in the eye(s). It is called pachymetry.

An ultrasound of the eye, also called echography, uses sound waves to create images and measurements of the structures in the eye(s). Pachymetry is a specific ultrasound test that measures corneal thickness. Corneal thickness is important because:

  • Thin corneas can lead to false low glaucoma test results.
  • Thick corneas can lead to false high glaucoma test results.

Pachymetry may also be needed if you are being considered for corneal surgery like LASIK or have certain diseases of the cornea.

An ultrasound of the eye takes about 15 minutes and is usually painless.

  • Prior to the test, your healthcare provider will numb your eye with special drops.
  • He or she will then place a special probe covered with a clear gel on the front of your eye.
  • The probe does not come into direct contact with your eye.
  • The gel will help send the sound waves to the computer.

Your healthcare provider will tell you if you need to do anything to prepare for the ultrasound.

The costs for this test include the charge for the test (facility charge) and physician charges (for performing or interpreting the test). You may get separate bills from the facility and the physician's office.

What should I ask my healthcare provider before having this test?

  • Is there any special preparation for the test? (If so, get clear instructions on what you need to do.)
  • Why are you ordering this test? Will the test results change my treatment plan? If not, do I need the test?

Source UHC.com

Also known as:

Measurement of Cornea
Eye Ultrasound
Eye Sonogram
Cornea Measurement

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