Central Corneal Thickness & Axial Length In Myopia of Various Grades
Keywords:
Myopia, Central corneal thickness, Grades of MyopiaAbstract
Background: Myopia is one of the most commonly observed refractive error. Myopia also known as short sightedness, is that dioptric condition of eye in which, with the accommodation at rest incident parallel rays come to a focus anterior to the light sensitive layer of retina, resulting in a defocussed image on the retina. Etiology of myopia is still unknown, approx. two thirds of optical refraction is due to the cornea and its relation with myopia has been studied since a long time. Methods: In this prospective cross sectional study of 100 patients, all grades of myopic visiting Ophthalmology OPD were included after undergoing refraction. They were in the age group of 18-40 years. Subjects with corneal disorders, glaucoma, cataract, previous ocular surgeries were excluded. Result: among 100 myopic patients studied 64 (64%) were low myopes, 26 (26%) were moderate myopes and 10 (10%) belonged to high myopia. Correlation between CCT & Axial length in all grades of myopia studied using Karl Pearson’s coefficient and difference in CCT & Axial length in all grades of myopia was studied using z test. Conclusion: this study has shown that there was a significant difference between CCT among moderate & high grades of myopia, significant difference between AL & all grades of myopia and significant correlation between CCT & AL in all grades of myopia.
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