Comparison of central and peripheral corneal thickness in different degree of myopic patient.

Abstract

PURPOSE: To find out the comparison and correlation of corneal thickness in different regions (central versus peripheral) in various grades of myopia (mild, moderate and severe), and to note any changes occurring in these regions and in these different grades.

MATERIALS AND METHODS: This was a comparative cross-sectional study. Retinoscope and pachymeter were used in the study to measure the corneal thickness and assess different grades of the refractive error. Data were gathered using self-designed Proforma after taking informed consent, Analysis was done using SPSS software to evaluate the comparison and correlation of corneal thickness in the central (CCT) vs peripheral regions (PCT). The study was conducted on 54 patients having myopia of different degree with an age range of 13 to 50 years. Visual acuity of the patient was taken by using log Mar Chart at 4m.

RESULTS: This study includes a total of 54 patients (include both right and left eyes). Out of 54 Patients, 51.85% (28) were male and 48.15% (26) were female. There was no significant difference found between corneal thickness in the central and peripheral regions in subjects having the mild, moderate and severe grade of myopia (p>0.05). The mean value of CCT of both eyes is 535±5 and PCT was 669±38.50, 660±30.0, 720±40.92, and 750±46.92 for superior, inferior, nasal and temporal respectively.

CONCLUSION: This study concludes that the difference between corneal thickness in the central and peripheral region was not significant. Similarly, Thickness is not affected by mild, moderate and severe myopic eyes to the extent that might need a change in treatment modalities.