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Comparative Study
. 2014 Jan;62(1):55-9.
doi: 10.4103/0301-4738.126182.

Comparison of saccadic reaction time between normal and glaucoma using an eye movement perimeter

Deepmala Mazumdar, J J M Pel, Manish Panday, Rashima Asokan, L Vijaya, B Shantha, Ronnie George  1 , J Van Der Steen
Affiliations
Comparative Study

Comparison of saccadic reaction time between normal and glaucoma using an eye movement perimeter

Deepmala Mazumdar et al. Indian J Ophthalmol. 2014 Jan.

Abstract

Aim: To compare the saccadic reaction time (SRT) in both the central and peripheral visual field in normal and glaucomatous eyes using eye movement perimetery (EMP).

Materials and methods: Fifty-four normal and 25 glaucoma subjects underwent EMP and visual field testing on the Humphrey Field Analyser (HFA) 24-2 program. The EMP is based on infrared tracking of the corneal reflex. Fifty-four test locations corresponding to the locations on the 24-2 HFA program were tested. SRTs at different eccentricities and for different severities of glaucoma were compared between normal and glaucoma subjects.

Results: Mean SRT was calculated for both normal and glaucoma subjects. Mann-Whitney U test showed statistically significant (P < 0.001) differences in SRT's between normal and glaucoma subjects in all zones.

Conclusion: SRT was prolonged in eyes with glaucoma across different eccentricities.

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Conflict of interest statement

Conflict of Interest: None declared.

Figures

Figure 1
Figure 1
Eye movement perimeter display screen showing the tracking status for both eyes
Figure 2
Figure 2
Eye movement perimeter setup used for the study
Figure 3
Figure 3
Eye movement pattern in a Matlab window where a saccadic eye movement was made from the center towards a peripheral target in the lower left field
Figure 4
Figure 4
Measurement of saccadic reaction time from tracking data
Figure 5
Figure 5
Division of tested points into eight zones equidistant from the center
Figure 6
Figure 6
Comparison of saccadic reaction times between normal and glaucoma at varying eccentricities (mean, error bars show standard errors)
Figure 7
Figure 7
Mean SRT in mild, moderate, and severe glaucoma at different eccentricities
See this image and copyright information in PMC

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