Study of correlation of cup disc ratio with visual field loss in primary open angle glaucoma

Journal Title: Indian Journal of Clinical and Experimental Ophthalmology - Year 2017, Vol 3, Issue 1

Abstract

Objective: To correlate the cup/disc ratio with visual field defect in primary open angle glaucoma patient using magnified photograph of optic disc and Humphrey field analyzer. Method: Cross sectional study includes 114 eyes of 60 patients suffering from primary open angle glaucoma. All patients were 40 years age having IOP 21 mmHg and gonioscopically open angle of anterior chamber. The things assessed includes IOP, angle of anterior chamber, optic disc and visual field. Results: Total 114 eyes of 60 patients with primary open angle glaucoma included in study. Mean age of patient in our study was 58.7±10.26 year. Out of 60 patients, 31 (51.66%) were male and 29 (48.33%) were female. 12 eyes (10.52%) had IOP in the range of 21-24 mmHg, 52 eyes (45.61%) had IOP in the range of 25-29 mmHg, 48 eyes (42.10%) had IOP in the range of 30-34 while only 2 eyes (1.75%) had IOP > 35 mmHg. Mean IOP of 114 eyes was 27.9±3.23 mmHg. 32 patient (28.07%) had C:D ratio of 0.6 whereas 30 patient (26.31s%) had C:D ratio 0.7. Mean C:D ratio of POAG was 0.64±0.07. Considering other parameter of the optic nerve head it was seen that Bayonetting sign was present in 60 eyes. Meanwhile baring of vessels was seen in 46 eyes. Laminar dot sign, on the other hand was seen in 72 eyes. Beta zone peripapillary atrophy was seen in 78 eyes. Another important parameter of the optic disc is notching. In 53 eyes notching was seen. Out of these, 35 eyes show superior notching, of which 33 eyes (94.3%) correlated with inferior field defects. 18 eyes show inferior notching, and all of them showed superior field defect. Inferior neuroretinal thinning is found in 55 eyes, out of which 50 eyes (90.9%) had correlating visual field defect while 32 eyes (86.5%) with superior neuroretinal thinning correlate visual field defect. Maximum number of eyes show superior zone defect i.e. 54 eyes (47.36%) followed by inferior zone defect in 25 eyes (22.0%). The least common visual field defect in our study is baring of blind spot in 3 eyes (3.0%). Finally, the patients were divided into 2 group depending on their cup disc ratio, and their association with the field defects was evaluated. Group 1- patients with c:d ratio < 0.7;Group 2- patients with c:d ratio 0.7. The pattern defects signifying the localized defects were then compared between the two group. The average pattern defect in group- 1 was found to be 6.16 db, while the average pattern deviation in group- 2 was 9.62 db. The association of c:d ratio 0.7 with PD was seen to be significant with a p <0.001. Conclusions: This was a cross sectional study done over a period of 1 year to correlate the optic disc changes with the visual field defects by using optic disc evaluation and Humphrey visual field analyzer done. The correlation between cup disc ratio and intra.

Authors and Affiliations

Pankaj Soni, Ashwani Srivastava, Akash Srivastava, Deepti Yadav

Keywords

Related Articles

Evaluation of posterior segment manifestations following typhoid fever-a clinical study

Aim To describe fundus manifestations following typhoid fever and their response to systemic steroidsMaterials and Methods A retrospective study was done on 14 patients during April 2015Feb 2016 presenting with complaint...

Comparison of endothelial cell characteristics and corneal thickness between diabetics and non-diabetics

Objectives: To compare endothelial cell characteristics & corneal thickness between diabetic and non-diabetic population. Materials and Methods: This was a prospective, non-interventional, cross sectional study where 200...

Clinical evaluation of dry eyes in patients with rheumatoid arthritis

Purpose To detect dry eye and to associate it with rheumatoid factor and severity of disease in rheumatoid arthritisMaterials and Methods Crosssectional explorative study study period December 2013 to October 2015 Fifty...

Analysis of macular thickness by spectral domain OCT in normal healthy population of Gujrat, India

Introduction Study was conducted to analyse the average macular thickness globally from different age group from the healthy Indian population Study will help to quantify any difference in thickness between gender and ri...

Clinical profile of herpes simplex viral keratitis cases attending eye opd in tertiary hospital of Chhattisgarh state

Introduction: Herpes simplex viral keratitis is a very common infective disease in western countries. Despite the availability of excellent topical antiviral agents, HSV remains a leading cause of unilateral corneal blin...

Download PDF file
  • EP ID EP298019
  • DOI 10.18231/2395-1451.2017.0003
  • Views 114
  • Downloads 0

How To Cite

Pankaj Soni, Ashwani Srivastava, Akash Srivastava, Deepti Yadav (2017). Study of correlation of cup disc ratio with visual field loss in primary open angle glaucoma. Indian Journal of Clinical and Experimental Ophthalmology, 3(1), 3-10. https://europub.co.uk/articles/-A-298019