ArticleInternational journal of ophthalmology2020
Flicker defined form and RareBit measurements lack in specificity of visual pathways.
Article in International journal of ophthalmology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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5 authors at 1 institution in 1 country.
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Abstract
aimTo evaluate the different visual pathways represented by the Heidelberg Engineering Perimeter flicker defined form and RareBit (magnocellular and parvocellular respectively) in different age-groups and according to the fatigue.
methodsTotally 64 eyes of 32 healthy subjects were included in the prospective study. Each participant underwent screening-ophthalmic examination including best-corrected visual acuity, anterior and posterior segment assessment, and visual field examination with Heidelberg Edge Perimetry (HEP)-standard automated perimeter (SAP) 24-2. They were observed for 2y previously to the enrollment. This helped to define that the enrolled patients did not bear the glaucoma-developing potential. During the screening and after two years the HEP had been conducted in the standard protocol 24-2 and RareBit perimetry (RBP) in accordance with the manufacturer's description. Participants were randomly assigned to the groups: flicker defined form (FDF)-first or RBP-first. This defined from which additional visual field test the participant started. Participants were additionally subdivided to younger and older study groups. The effect of subject variables was explored with Mann-Whitney
resultsThe positive correlation between mean deviation (MD) and mean hit rate (MHR) and pattern standard deviation (PSD) and standard deviation of MHR (±MHR) were found in younger study group (
conclusionThe influence of patient's fatigue should be considered during HEP-FDF examination. An overlap hypothesis should be reevaluated after determining of other factors that affect HEP-FDF and RareBit results.
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