What Is Astigmatism?
6. Disease Process
Astigmatism occurs as a result of a combination of internal and external causes. The external surface is the cornea and the internal causes include the lens, retina, posterior surface of the cornea, and the eye fluids. The disease process differs from one patient to the other depending on the causative factors. In some people, the internal causes predominate and in other cases, external causes do.
Symptoms can appear at any stage and in any sequence. The diagnosis of the condition depends on analyzing the factors contributing to refraction. After all, when a certain component of the eye gets affected, the whole eye, including its ability to refract light, is also affected.
Advertisement
