RELATIONSHIP OF CENTRAL CORNEAL THICKNESSES (CCT), KERATOMETRY MEAN (KM) AND AXIAL LENGTH (AL) AMONG SUDANESE ADULT MYOPES

摘要

Objectives: This study aimed to explore the correlation of central corneal thicknesses (CCT), mean keratometry (KM) and axial length (AL) to myopia degree in spherical equivalent (SE) among Sudanese adults. Study Design: Cross sectional study. Setting: University Eye complex clinic and Makka Eye complex Omdurman. Period: April to October 2015. Methods: Central Corneal Thickness (CCT), k-reading (KM), axial length and the degree of refraction (SE) 0f 200 myopic eyes and 60 emmetropic eyes as a control group were measured. Results: Adult Sudanese females (57%) were found greater than males (43%) population; (χ 2 = 109.5, p = 0.000 ), most of the participants’ age was less than 25 years (χ 2 = 109.5, p = 0.000 ), and the mean myopic spherical equivalent (SE) was – 4.79 ± 2.55 D, ranging from -1.00 to -11.00 D. The mean CCT of the myopic group was 542.8 ±11.9 μm, while for the emmetropic group was 538.7 ±12.4 μm. The cornea were steeper in eyes with longer axial length (r = 0.24, p =0.001). Eyes with higher myopic spherical equivalent had longer axial length (r =0.30, p 0.001). Mean keratometrys were steeper with increasing age (r= 0.24, p= 0.001). This study has shown that CCT has no correlation with degree of myopia (p= 0.46), gender (p= 0.99), and age (p= 0.07). The CCT, KM, and AL means for myopic participants were found significantly greater than emmetropic participants (p=0.000, 0.000, and 0.044 respectively. Conclusion: The females participants of myopia were higher rate than males, early adults’ age group were of higher rate myopic incident; there was no correlation between CCT and the degree of myopia, gender, and age. CCT, KM, and AL means for myopic were found higher than emmetropic participant. Eyes with more myopic spherical equivalent had longer axial length; corneal curvature mean becomes steeper with increasing age.