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Year : 2018  |  Volume : 5  |  Issue : 3  |  Page : 69-73

Central corneal thickness measurement of non-glaucomatous adults in Ahmadu Bello University Sick Bay, Samaru, Zaria

Department of Ophthalmology, Ahmadu Bello University Teaching Hospital, Shika-Zaria, Kaduna, Nigeria

Correspondence Address:
Kehinde Oladigbolu
Department of Ophthalmology, Ahmadu Bello University Teaching Hospital, Shika-Zaria, Kaduna
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ssajm.ssajm_30_18

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Background: Central corneal thickness (CCT) is the measurement of the center of the cornea and also a parameter for assessing the corneal health status. Normal mean values for CCT range between 521 μm and 554 μm due to racial and age differences; this is an important factor to consider when measuring intraocular pressure (IOP). The CCT is supposed to influence the IOP measurement in the cornea with overestimation of IOP in thicker corneas and an underestimation in thinner corneas. Objectives: To determine the mean CCT of nonglaucomatous adults in the Eye Clinic of Ahmadu Bello University (ABU) Sick Bay Samaru, Zaria, and the correlation between CCT and IOP, age, gender, and refractive error. Materials and Methods: Consenting adults who met the inclusion criteria were selected using simple random sampling. The participants had visual acuity assessment for both distance and near and detailed ocular examination. IOP and CCT were measured with Perkins handheld applanation tonometer and PacScan 300AP ultrasonic pachymeter, respectively. Data were entered in a pretested questionnaire and analyzed using Statistical Package for the Social Sciences (SPSS) version 23.0. Results: More female participants were recorded in the study, 55 (67.9%). The mean age of all participants was 40.01 years (SD ± 13.86). The combined mean CCT for both eyes was 531.18 µm (95% CI, 522.65–539.71). A moderate inverse correlation shows the CCT decreases with increasing age (r = –0.42, P < 0.001) and a weak linear correlation with presbyopia was significant (r = 0.23, P = 0.03). No significant correlation was found between CCT and IOP, gender, and other types of refractive error. Conclusion: The mean CCT of nonglaucomatous adults in this study is comparable to those of other Nigeria and African figures. There is a very significant inverse correlation between CCT and age.

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