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 responsible for some 70% of the eye’s refractive power, its curvature is of critical importance in determining the quality of vision.
The three-dimensional map is therefore a valuable aid to the examining optometrist and can assist in the diagnosis and treatment of a number of conditions, including corneal pathologies like keratoconus and pellucids marginal degeneration. Corneal topography is also essential in assessing a patient’s candidacy for refractive surgery (LASIK) and evaluation of its results; and in designing custom gas permeable contact lenses utilizing the WAVE Contact Lens System. The procedure is carried out in seconds and is completely painless.
At Premier Eyecare, we utilize one of the most advanced corneal topographers on the market. The Medmont corneal topographer, manufactured in Australia, is widely considered one of the most accurate corneal topographers produced and is utilized in many of the top contact lens clinics and teaching institutions worldwide.
The use of corneal topography is absolutely essential for achieving excellent outcomes in overnight orthokeratology (Corneal Refractive Therapy). In fact, advancements in corneal topography helped to drive the resurgence in ortho-k over the last decade. Difference maps which compare the shape of the cornea, pre and post treatment, allows the optometrist to visualize the fit of the retainers in the closed eye state. This data reveals the effectiveness and centration of the treatment zone and aids in making any necessary modifications to the corneal retainers.