Corneal examination
A corneal examination is a comprehensive evaluation of the cornea, the transparent front part of the eye. The cornea is responsible for about 70% of the eye’s focusing power. A corneal examination can include:
Corneal topography
A painless test that produces 3D images of the cornea’s shape and curvature. It can help detect and monitor corneal conditions, such as swelling, scarring, and abrasions. Corneal topography is also used to plan eye surgery and fit contact lenses.
Slit lamp exam
An eye doctor uses a microscope with a bright light to examine the cornea and other parts of the eye. The eyes may be dilated for this procedure.
Applanation tonometry
A gentle pressure is applied to the cornea to measure the amount of force required to flatten it temporarily.
Pachymetry
An instrument uses ultrasound waves to measure the thickness of the cornea.