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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Shihota Ramanjit, Tandon Radhika, parsons disease of the eye, Published by Elsevier, India pvt limited, New Delhi, 21st edition, page-73.
Line-kong pi et al: Refractive status and prevalence of refractive errors in suburban school-age children. Int J Med Sci. 2010; 7(6): 342-353.
Samant P, Bangal S.V, Prevalence of refractive errors as a cause of childhood blindness in school going children of a rural setup Z. P school, ICMR, 2011, Page-21.
Fam HB, How AC, Baskaran M, Lim KL, Chan YH, Aung T. Central corneal thickness and its relationship to myopia in Chinese adults. Br J Ophthalmol 2006;90:1451-3.
Vijaya L, George R, Arvind H, Ve Ramesh S, Bankaran M, Raju P, et al. Central corneal thickness in adult South Indians: The Chennai Glaucoma Study. Ophthalmology 2010;117:700-4.
Trupti Solu, Pathik Baravaliya, et al: Correlation of Central Corneal Thickness and Axial Length in Myopes, Emmetropes, and Hypermetropes. International Journal of Scientific Study; March 2016, Vol 3 Issue 12: 206-209.
Elias Anna, Giridhar A, et al: Central Corneal Thickness and relating factors- A Prospective Observational Study. Kerala Journal of Ophthalmology 2006; Vol. XXI, No. 2:150.
Von Bahr G. Corneal thickness: its measurement and changes. AM J Ophthalmol 1956;42:251-66.
Bueno-Gimeno I, Espana-Gregori E, Gene-Sampedro A, Lenzagorta- Aresti A, Pinero-Llorens DP. Relationship among corneal biomechanics, refractive error, and axial length. Optom Vis Sci 2014;91:507-13.
Chen MJ, Liu YT, Tsai CC, Chen YC, Chou CK, Lee SM. Relationship between central corneal Thickness, refractive error, corneal curvature, anterior chamber depth and axial length. J Chin Med Assoc 2009;72:133-7.
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