If you have suffered from any sort of corneal abrasion, your doctor may need to give you a certain test called corneal topography. This is to help them see the damages done to your cornea by showing them the surface curvature of your cornea.
It is understandable that you might be a little nervous especially if you feel that you might go blind. But don’t worry because your doctor knows what he/she is doing. They will be using a corneal topographer to assist them in further examining your corneas.
More about Corneal Topography
This kind of examinationoffers your physician with very detailed resultsabout the condition of your corneal surface. These details are used to diagnose, monitor, and treat various eye conditions. They are also used in fitting contact lenses and for planning surgery, including laser vision correction. The topography map is used with other tests to exactly determine justhow much corneal tissue is needed to be removed to correct vision and with what ablation pattern for laser vision correction.
What are the steps?
The patient is seated facing a bowl containing an illuminated pattern, most commonly a series of concentric rings. The pattern is then focused on the frontal surface of the patient’s cornea and mirrored back to a digital camera located at the centre of the bowl. The topology of the cornea is revealed by the shape taken by the reflected pattern. Computer software programs then digitize these specificdata to yield a printout of the corneal shape, using various colours to recognizevarious elevations, just like how a topographic map of the earth shows changes in the land surface. The non-contact testing is painless and brief.
What are the diseases that can be diagnosed using Corneal Topography?
Corneal diseases like Keratoconus, a progressive thinning of the cornea, also corneal abrasions and corneal deformities. It is also used to find out why you are experiencing irregular astigmatism following corneal transplants and knowing if you have postoperative cataract extraction with acquired astigmatism. There are a lot of corneal diseases of which Corneal Topography is used to know if you have those diseases or not.
Now that you know more about Corneal Topography, you at least know what to expect of you are ever needed to take this test. The basic knowledge is important so that when your doctor is explaining to you regarding your situation, you know what you are up against and what they are making you understand.