Eye topography, also known as corneal topography, is a tool used to map the curvature and shape of the cornea (the front transparent surface of the eye). This mapping provides detailed information about the corneal surface, allowing optometrists to diagnose and manage various eye conditions such as astigmatism, keratoconus and irregular corneas.
Topography works by projecting a series of light patterns onto the cornea and measuring the reflection or distortion of these patterns. From these measurements, a colour-coded map of the corneal surface is created indicating areas of steepness and flatness.
Topography can be used to detect irregularities on the cornea surface such as astigmatism, when the cornea is not perfectly spherical. It can also identify conditions like keratoconus, where the cornea becomes progressively thinner and more conical in shape, which can lead to visual distortion and reduced visual acuity. It is also a valuable tool for fitting specialty contact lenses on patients with irregular corneas or high astigmatism.
Topography can also be used in patients who have had refractive surgeries like LASIK or PRK. It can help assess the stability of the cornea post-surgery and detect irregularities or complications that may arise.
The information obtained from a topography scan can guide treatment decisions. For instance, in keratoconus management, topography guided procedures such as corneal cross-linking or customized speciality contact lenses may be recommended based on the severity and pattern of corneal irregularity seen on a topographic map.
Eye topography is a valuable diagnostic tool used in modern optometry practice for diagnosing, monitoring and managing a wide range of corneal conditions.
If you are interested in having a topography map of your eye done or have questions about this technology, contact your Hamilton eye doctor. Book your eye exam at 289-309-1090.
