Abstract

Objective: observing difference in pattern of disc and visual field damage produced by NTG and HTG.

Methodology: A Cross sectional study conducted at MYH & MGM Medical College, Indore, from Oct 2015 to oct 2017. The visual fields showing defects suggestive of glaucoma were taken for study and 22 such fields of 22 eyes with normal-tension glaucoma were compared to 20 visual fields of 20 eyes showing high-tension glaucoma. We studied the differences in the number of patients with defects extending to within 10 degrees of central fixation, in the amount of localized visual field loss (pattern standard deviation), and in the amounts of generalized visual field loss (mean deviation) in normal-tension glaucoma and high-tension glaucoma groups.

Results: During the study period, 42 eyes of 42 patients were taken up for this cross-sectional analysis including 22 NTG and 20 HTG patients were analysed. Out of total 42 patients, 24(57.14%) were males and 18 (42.86%) were females. The mean age of the patients was 31 ± 4.6 years in NTG and 39 ± 2.8 years in HTG groups. We also found characteristic differences in field defects among NTG and HTG groups in most of our patients where the NTG patients had a greater amount of focal visual field loss (pattern standard deviation) and greater paracentral field defects.

Conclusion: In conclusion our study suggests that the visual fields defects of NTG patients differ from that of HTG patients. As field defects of NTG patients affect the central vision earlier, more vigilant and frequent monitoring is required in these cases.