Corneal Topographers Are Used To Trace the Cornea's Curved Surface for Finding Indications of Underlying Eye Diseases

 

Corneal Topographers

Corneal topographers, more commonly known as Photokeratoscopy, are a non-surgical medical imaging method used in regions such as the U.S., U.K. and Italy among others, for non-intravenous mapping of the corneal surface. Unlike conventional corneal topography, laser peripheral iridotomy is used to treat patients with myopia, hypermetropia, or astigmatism. The procedure involves the insertion of a thin fiber-optic laser into the central area of a cornea called the iris. The resulting corneal flap is used as a guide for treating the affected areas to improve vision.

In conventional corneal topographers (x-ray or tomography), light is emitted on the corneal surface from the focused laser beam. As the light passes through the corneal tissue, the irregularities in the corneal surface are observed by reflected light. This image provides information about the internal microcosm and the optical properties of the corneal layer. The main advantage of corneal topographers is that they can provide detailed images of the microstructure of a small region of interest while using a low-energy laser rather than a conventional x-ray lamp. It enables the detection of unusual glaucoma or other eye diseases before they progress to retinal detachment.

The objective of corneal topographers is to create a three-dimensional picture of the corneal surface in a clear and picturesque manner. The first step of this technique is the generation of corneal topographers by injecting light in a particular pattern that will generate a reflection in the corneal tissue. As the light travels through the corneal flap, it causes refraction of the incoming light so that it appears as a sharp point on the corneal surface. After the injection of the light, a change in the permeability of the corneal topography will cause characteristic changes in the light wave that reflects on the corneal surface. In a region such as the United States, owing to increased screen timing and choice of personal, issues related to eye care are the maximum. For instance, according to the Centers for Disease Control and Prevention, around 93 million adults in the U.S. are highly vulnerable to serious vision loss.


Location: India

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