An Observational Study Comparing the Correlation of Vertical Cup Disc Ratio and Disc Damage Likelihood Scale with Visual Field Changes and Central Corneal Thickness in Primary Open Angle Glaucoma Patients
Journal Title: Journal of Medical Science And clinical Research - Year 2017, Vol 5, Issue 2
Abstract
Background: The current management of primary open angle glaucoma involves cutting edge diagnostic technology but the clinical examination of the optic disc still remains the mainstay of both diagnosis and therapy. The disc damage likelihood scale is a useful tool devised to diagnose and follow up glaucoma patients. Purpose: To compare the Disc Damage Likelihood Scale (DDLS) vis-à-vis the vertical cup disc ratio (VCDR) to document optic disc changes in primary open angle glaucoma (POAG) patients with respect to visual field changes and central corneal thickness (CCT). Materials & Methods: 109 eyes of 57 patients attending the Glaucoma clinic at a tertiary care hospital, underwent clinical evaluation, complete medical and ophthalmic history profiling, slit lamp examination, applanation tonometry, Gonioscopy, 78 D biomicroscopy, specular microscopy for CCT and visual field analysis ( HFA 24-2 program). The patients’ VCDR, DDLS, MD, PSD and CCT were recorded and Pearson’s correlation coefficients were calculated for all data sets. Results: 57 patients underwent this study with a mean age of 53.74 years. The Pearson’s correlation coefficient (r) for VCDR vs MD was 0.603 and that for DDLS vs MD was 0.821. The r for VCDR vs PSD was 0.447 and that for DDLS vs PSD was 0.621. The r for VCDR and DDLS Vs CCT was -0.57 and -0.61 respectively. Conclusion: The DDLS is a better system than the VCDR as it correlates more strongly with visual field indices and CCT. It increases the clinical disc evaluation value for glaucoma patients at no extra cost.
Authors and Affiliations
Shashwat Bhattacharyya
Keywords
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