Return to Medical Eye Conditions Page

Return to Our Clinic Page

Corneal Topography

CORNEAL TOPOGRAPHY (Zeiss Atlas Corneal Topographer)

Corneal topography is a non-invasive medical imaging technique for mapping the surface curvature of the cornea, the outer structure of the eye. Since the cornea is normally responsible for some 70% of the eye's refractive power, its topography is of critical importance in determining the quality of vision.

The three-dimensional map is therefore a valuable aid to assist in the diagnosis and treatment of a number of conditions; in planning refractive surgery such as LASIK and evaluation of its results; or in assessing the fit of contact lenses. Corneal topography extends the measurement range from the four points a few millimeters apart that is offered by keratometry to a grid of thousands of points covering the entire cornea. The procedure is carried out in seconds and is completely painless.

The patient is seated facing a bowl containing an illuminated pattern, most commonly a series of concentric rings. The pattern is focused on the anterior surface of the patient's cornea and reflected back to a digital camera at the centre of the bowl. The topography of the cornea is revealed by the shape taken by the reflected pattern. A computer provides the necessary analysis, typically determining the position and height of several thousand points across the cornea. The topographical map can be represented in a number of graphical formats, such as a sagittal map, which color-codes the steepness of curvature according to its dioptric value.

If you have any questions regarding any procedure, we're here to provide you the answers.

Homepage Eyewear Gallery Eyewear Virtual Tour Our Clinic Clinic Virtual Tour Our Doctors Forms Contact Us

State-of-the-Art Medical Equipment Technology and Services
Cataract Lasik Glaucoma Diabetic Eyecare Contact Lenses Bifocals Macular Degeneration Dry Eye Ocular Allergies

Designer Eyewear Frames
Cool Eyeglass Frames • Eyeglass Frames for Women • Eyeglass Frames for Men
Armani Eyeglass Frames • Axels • Beau Solei • Christian Dior Eyewear • Disney Eyewear • Juicy Couture Eyewear
Etnia Eyewear Barcelona • Face a Face Glasses • Fendi Eyeglass Frames • Gucci Eyewear • Ic Berlin Frames
Kate Spade Eyewear • Marc Jacobs Eyewear • Marc Jacobs Glasses • Marc Jacobs Sunglasses • Mykita Eyewear
Mykita Eyeglasses • Oxibis Eyewear • Prodesign Denmark • Pro Design Eyewear • Tagheuer Eyewear • Tag Sunglasses
Tag Glasses • Traction Eyewear • Volte Face Eyewear

Houston Eyecare • North Houston Eyecare • Northwest Houston Eyecare • Klein Eyecare • CyFair Eyecare • Spring Eyecare
Cypress Eyecare • Tomball Eyecare • The Woodlands Eyecare • Conroe Eyecare • Magnolia Eyecare • Louetta Eyecare
Willowbrook Eyecare • Memorial Eyecare • Galleria Eyecare

North Houston • Northwest Houston • Spring • Cypress • Tomball • The Woodlands • Conroe • Magnolia • Louetta • Willowbrook