The measurement of the flattest and steepest meridians of the patient's cornea.
An inflammation of the cornea that can be caused by mechanical irritation, solution sensitivity, allergy, infection, or other disease process.
An inflammation involving both the cornea and the conjunctiva.
A condition where the cornea becomes cone-shaped, causing major vision distortion. People with keratoconus are particularly challenging to contact lens fitters, who usually must prescribe custom-made lenses for them.
An instrument used to measure the curvature of the two principle meridians of the central cornea.