Clinical Assessment of a Patient with Compound Myopic Astigmatism and Convergence Insufficiency

Topics: Myopia, Eye, Refractive error Pages: 4 (1122 words) Published: September 17, 2013
Case Report

Clinical Assessment of a Patient
With Compound Myopic Astigmatism and
Convergence Insufficiency

Myopic astigmatism is a specific type of astigmatism wherein the light focuses before it reaches the retina. This condition is classified as a combination of astigmatism and myopia, or nearsightedness. If both principal meridians are nearsighted, but one is more pronounced than the other, it is considered to be a compound myopic astigmatism. Convergence Insufficiency on the other hand is a condition wherein the eyes are unable to turn inward or converge properly during near work which causes a difficulty to focus normally due to the deficiency in eye teaming which creates a strong tendency for the eyes to drift outward. Convergence insufficiency is likewise associated as exophoria at near.

Myopia, Astigmatism, Exophoria, Convergence, Convergence Insufficiency

Myopia or nearsightedness, is a refractive error, which means that the eye does not bend or refract light properly. In this sense, the light that enters the eye focuses the image in front of the retina. In cases of myopia, a person is to see things at near with much more clarity than fixating at distant targets. Myopia occurs when the eye is has a longer axial length than normal would have or an eye that has a cornea which is relatively steeper than an emmetrope's. The degree of myopia or nearsightedness affects the eye’s ability to focus on distant objects. People with high amounts of myopia can see clearly only objects just a few inches away, while those with lower amounts of myopia may still see objects at a distance with enough clarity.

Astigmatism on the other hand is a condition wherein the rays of light entering the eye focuses on different areas, in the case of Compound Myopic Astigmatism, both the power meridian and the axis meridian forms its focus in front of the retina. Astigmatism usually is caused by an irregularity in the shape of the...
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