Objective: To compare and correlate intraocular pressure (IOP) and cup-to-disc (CD) ratio with high myopes and high hyperopes.
Methodology: This cross-sectional comparative study included 90 subjects visiting Riphah eye clinic, QIE campus, Lahore from Nov-22 to Oct-23. The subjects were divided into three groups: emmetropes (n=30), high hyperopes (n=30), and high myopes (n=20). Those with any ocular disorder other than refractive error were excluded. The IOP was measured by using a Goldmann applanation tonometer and cup-to-disc ratio was measured using an ophthalmoscope. The comparison and correlation of data were done using independent sample Kruskal Wallis test and Pearson correlation test.
Results: The mean IOP of emmetropes, hyperopes, and myopes was 12.4±0.84 mm Hg, 13.83±4.01 mm Hg, and 13.43±2.06 mm Hg, respectively (p=0.377). Mean CD ratio of emmetropes, hyperopes, and myopes was 0.25±0.05, 0.31±0.14, and 0.36±0.13, respectively (p=0.011). The IOP strongly correlated positively with CD ratio (r=0.779) and age (r=0.705). Likewise, CD ratio had a strong positive correlation with age.
Conclusion: There was a non-significant difference in IOP among emmetropes, myopes, and hyperopes. Moreover, myopes had a significantly sizeable CD ratio compared to emmetropes and hyperopes. The CD ratio was large in older subjects and positively correlated with IOP.
Key words: Myopia, hyperopia, intraocular pressure.
|
