Corneal topography is a special photography technique that maps the surface of the cornea. With a topography scan, a doctor can find distortions in the curvature of the cornea, which is normally smooth. It also helps doctors monitor eye disease and plan for surgery.

What Conditions Is Corneal Topography Used for?

• Scarring: Trauma (injury) or infections can scar the cornea. This changes the shape of the cornea. A topography scan measures the distortion/irregularity and its effect on vision.
• Astigmatism and keratoconus: Topography can help fine-tune astigmatism and help detect early cases of keratoconus and track their progression.
• Contact lens fitting: Topography scans help find what type of contact lens can be worn to improve vision. If the scan shows a lot of distortion/irregularity, sometimes a special hard contact lens can help correct vision.