Abstract

To evaluate the correlation between the pressure-to-cornea index and both structural and functional measures of glaucoma. Methods: A cross-sectional study was conducted in the Department of Ophthalmology, Total 100 patients with OHT or primary open angle glaucoma (POAG) older than 40 years of age of both genders, with 20/20 best corrected visual acuity and any ethnicity. Results: 40 patients were male (40%) and 60 female (60%). Mean age was 61.9 ± 24.5 years. The mean values of the MD and PSD from automated perimetry of the 100 eyes were 9.8 ± 7.7 dB and 5.3 ± 3.2 dB, respectively. The median C/D ratio was 0.9 (range, 0.2–1.1). The mean CCC was 523.0 ± 41.4 m, mean IOP was 20.7 ± 5.2 mmHg, and mean PCI was 130.8 ± 50.5. The PCI showed a statistically significant negative correlation with MD (r = −0.347, 95% CI, −0.539 to − 0.116; P = 0.002). Conclusion: PCI can be used as a unified risk factor. Statistical correlation between structural and functional measures of glaucoma to pressure to cornea index (PCI) was observed.

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