Background: The transparent cornea forms the anterior portion of the outer casing of the eye and has the dual functions of protecting the inner contents of the eye as well as providing about two thirds of the eye's refractive power.
Objectives: The purpose of this study was to evaluate the correlations between central corneal thickness and degree of hyperopia in adult populations.
Patients and Methods: This was a prospective cross-sectional, observational study conducted in Ophthalmology Department, Al-Azhar University Hospitals, were divided equally into two groups according to their ages : Group 1 included patients with age range from 20-37, and group 2 consisted of patients aged 42-56. Each group contained 15 males and 15 females. Approval of Al-Azhar University ethics committee was obtained for the study. The nature and methodology involved in the study were explained to the patient and informed consent were obtained.
Results: The results of the current study showed that the range of central corneal thickness (CCT) in group 1 was 512-631 um with mean ± SD of 570.87 ± 25.31. In group 2, CCT ranged from 530 to 694 um with mean ± SD of 567.37 ± 30.89. In addition, there was no significant correlation between CCT and age in either group. The present study delineated that the mean ± SD of refraction of both groups was 3.91 ± 1.20 and 3.17 ± 1.01 respectively. The median of cylinder in both groups was -1.5 and -1 respectively, and the median of axis was 75 and 92.5 respectively. Significant association between CCT and refraction could not be noticed in both groups besides the non-significant association between CCT with either cylinder or axis in them.
Conclusion: Among adult subject with age range 20-60, central corneal thickness did not correlate with age change. Degree of hyperopia did not affect central corneal thickness of adult subjects. Central corneal thickness did not correlate with degree of intraocular pressure in hyperopic adults with normal IOP.