Ocular Biometry Using Computed Tomography: In Jos, North Central Nigeria

Aims and Objective: To determine the normal ocular dimensions (AP and width) in Jos, North Central Nigeria using computed tomography scan.

Subjects and Methods: The ocular images of 251 patients who had cranial CT in Jos University Teaching Hospital without obvious ocular anomaly were retrogressively studied. The antero-posterior (axial length) and width were obtained at the maximum mid-axial images showing the maximum size of the lens. Statistical information and analysis was performed using SPSS version 20. Pearson correlation was performed and the level of significance set at p=0.05 student t-test was also performed to compare the difference of the mean ocular dimensions and sexes.

Results: The mean axial length found was 24.61 mm (right) and 24.01 mm (Left) while the width was 24.31 mm (Right) and 23.21 mm (Left). The ocular biometry was slightly higher in the right eyeball than the left, and also in males than females (37.2±21.1 and 36.6±23.2 for the male and females respectively). All the axial lengths were higher than the width in both males and females.

Conclusion: The ocular biometry were noted to be higher in males compared to females. The dimensions were noted to increase with age, though not statistically significant. The axial length was higher than the width.