Comparison of Saccadic Eye Movements Among the High-tension Glaucoma, Primary Angle-closure Glaucoma, and Normal-tension Glaucoma

Ganeshrao, Shonraj Ballae (2021) Comparison of Saccadic Eye Movements Among the High-tension Glaucoma, Primary Angle-closure Glaucoma, and Normal-tension Glaucoma. Journal of Glaucoma, 30 (3). pp. 76-82. ISSN 1057-0829

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Abstract

Précis: Saccadic eye movements were compared between hightension glaucoma (HTG), normal-tension glaucoma (NTG), and primary angle-closure glaucoma (PACG). Saccades were differently affected between the subtypes of primary glaucoma.Aim: The aim of the study was to compare saccadic eye movements in eyes with HTG, PACG, and NTG. Methods: Saccadic eye movements were recorded using the eye tracker Eyelink-1000 in 52 participants: 15 HTG, 14 PACG, 8 NTG, and 15 normal controls. All participants underwent a complete ophthalmic and visual field examination. Prosaccades were measured using the gap paradigm. Prosaccades were measured at 3 target eccentricities (5-, 7-, and 10-degree eccentricity). All prosaccade targets were projected outside the area of visual field defect.Saccade latency, average and peak velocity, and amplitude difference of the saccades were compared between glaucoma subtypes.Results: The mean±SD age was lesser in controls compared with glaucoma (P=0.02). The mean age in all the glaucoma subtypes was comparable (P=0.92). The average mean deviation in PACG (−16.66±6.69 dB) was worse (P=0.01) than in HTG (−11.56±6.08 dB)and NTG (−9.55±3.96 dB). The latencies were delayed, average and peak velocities were reduced, and saccades were hypometric in glaucoma compared with controls (P<0.01). Between subtypes, the differences in latency (P<0.01), peak velocity (P=0.02), and amplitude (P=0.02) were significant. Saccadic eye movements were significantly different in NTG compared with other glaucoma subtypes (post hoc analysis; latency (HTG vs. NTG; P<0.01, HTG vs. PACG; P=0.01), peak velocity (HTG vs. NTG; P=0.02) and amplitude difference (HTG vs.NTG; P=0.02).Conclusions: Saccadic eye movement parameters were differently affected among the glaucoma subtypes. Saccadic parameters were more affected in NTG

Item Type: Article
Uncontrolled Keywords: Saccadic eye movements; Glaucoma; Glaucoma subtypes
Subjects: Allied Health > MCOAHS Manipal > Optometry
Depositing User: KMC Library
Date Deposited: 01 Jun 2021 09:01
Last Modified: 01 Jun 2021 09:01
URI: http://eprints.manipal.edu/id/eprint/156732

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