Functional Testing in Glaucoma Diagnosis

Sethi, Shivani; Fay, Clifton; Bollinger, Kathryn E.

doi:10.1007/s40135-013-0010-8

Cited by 3 publications

(2 citation statements)

References 80 publications

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“…Successful intervention often depends on the recognition of changes in the optic nerve head (ONH) and/or retinal nerve fibre layer (RNFL) before visual field loss is manifest . Comprehensive ONH and visual field assessments are a basic component of glaucoma diagnosis complemented by gonioscopy and the measurements of intraocular pressure (IOP) and central corneal thickness (CCT) …”

Section: Introductionmentioning

confidence: 99%

Application of clinical techniques relevant for glaucoma assessment by optometrists: concordance with guidelines

Jamous

Kalloniatis

Hayen

et al. 2014

Ophthalmic Physiologic Optic

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Australian and New Zealand optometrists were well equipped to perform glaucoma assessments with the possible exception of gonioscopy. Advanced imaging modalities were not yet fully integrated into optometric practice, although optical coherence tomography has shown use by 23-32% of optometrists. A marked increase in use, availability and procedural confidence of gonioscopy and other techniques with therapeutically endorsed optometrists demonstrates the advantage and importance of additional training.

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Section: Introductionmentioning

confidence: 99%

Application of clinical techniques relevant for glaucoma assessment by optometrists: concordance with guidelines

Jamous

Kalloniatis

Hayen

et al. 2014

Ophthalmic Physiologic Optic

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“…These include pattern ERG, 16 multifocal ERG, 17,18 and multifocal VEP, 19,20 all of which require a high level of operator expertise and patient compliance and cooperation. 21 It has also been proposed that eye movements can provide an objective assessment of a patient's visual status. For example, in eye movement perimetry (EMP) a patient's saccades to peripherally presented targets are used to quantify visual function across the field.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Simulated Visual Field Loss on Optokinetic Nystagmus

Doustkouhi

Turnbull

Dakin

2020

Trans. Vis. Sci. Tech.

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Citation: Doustkouhi SM, Turnbull PRK, Dakin SC. The effect of simulated visual field loss on optokinetic nystagmus. Trans Vis Sci Tech. 2020;9(3):25, https://doi.org/10. 1167/tvst.9.3.25 Purpose: Assessment of functional vision across the visual field is hampered by a reliance on patients'subjective judgement of the presence of a stimulus, and the accompanying demands (time and attention) this places on them. As a first step toward determining whether an objective measure of an involuntary eye movement (optokinetic nystagmus [OKN]) could provide an objective measure of field loss, we determined how various measures of OKN depend on the extent of simulated visual field loss (SVFL). Methods:We used infrared eye-tracking to measure the eye movements of 16 healthy participants viewing horizontally translating 2-dimensional noise patterns over trials of varying contrasts and different levels of SVFL. We quantified the strength of OKN by estimating the velocity of tracking eye movements compared to the stimulus (OKN gain). These measurements were made using an open-loop SVFL paradigm, where a varying amount of gaze-contingent peripheral stimuli was occluded.Results: Full-field stimulation led to an average OKN gain of 0.92 ± 0.15. This value fell steadily with increasing SVFL to a value of 0.38 ± 0.20 when the periphery was not stimulated at all (i.e., the stimulus was a 5-deg. diameter foveal patch). We note considerable individual variation in OKN gain in all conditions. Conclusions:Measuring the extent of visual field loss using an objective measure of OKN gain is feasible.Translational Relevance: Simulated visual field loss reduces optokinetic nystagmus, but further refinement of this technique would be required to overcome individual differences and to pick up clinically relevant field defects.

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