Correlation of optic disc and visual field changes in primary open angle glaucoma

Abstract

ABSTRACT Objectives: This study was undertaken to assess the correlation of disc damage using Disc Damage Likelihood Scale (DDLS) with the visual field defects in patients with chronic simple glaucoma. Materials and Methods:113 eyes of 60 patients of Chronic simple glaucoma and glaucoma suspects were analysed and staged according to DDLS. Visual field testing was carried out and grading done by HPA criteria. Linear correlation, regression analysis and predictability were calculated using pearson correlation analysis using SPSS 16.0 software. Results: There were 37 males and 23 females in our study with a mean age of 59.4 ±12.4 years. DDLS showed a coefficient correlation value of r = 0.81, r = -0.80 and r = 0.46 (p<0.0001) when plotted against HPA, MD and PD respectively.CD ratio showed a coefficient correlation value of r =0.69, r= -0.68, r= 0.27 when plotted against HPA, MD and PD respectively. DDLS had an excellent predictability compared to CDR. Conclusion:DDLS is significantly correlated with the degree of glaucomatous visual field damage in patients with chronic simple glaucoma, and thus it is helpful in early diagnosis of glaucoma. DDLS is an easy, inexpensive, quick method to document and manage early cases of COAG.