A pilot study examining density of suppression measurement in strabismus

Strabismus
Marianne Piano, David Newsham

Abstract

Establish whether the Sbisa bar, Bagolini filter (BF) bar, and neutral density filter (NDF) bar, used to measure density of suppression, are equivalent and possess test-retest reliability. Determine whether density of suppression is altered when measurement equipment/testing conditions are changed. Our pilot study had 10 subjects aged ≥18 years with childhood-onset strabismus, no ocular pathologies, and no binocular vision when manifest. Density of suppression upon repeated testing, with clinic lights on/off, and using a full/reduced intensity light source, was investigated. Results were analysed for test-retest reliability, equivalence, and changes with alteration of testing conditions. Test-retest reliability issues were present for the BF bar (median 6 filter change from first to final test, p = 0.021) and NDF bar (median 5 filter change from first to final test, p = 0.002). Density of suppression was unaffected by environmental illumination or fixation light intensity variations. Density of suppression measurements were higher when measured with the NDF bar (e.g. NDF bar = 1.5, medium suppression, vs BF bar = 6.5, light suppression). Test-retest reliability issues may be present for the two filter bars currently still under...Continue Reading

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Citations

Jul 2, 2020·Investigative Ophthalmology & Visual Science·Ling GongJiawei Zhou
Aug 1, 2020·Journal of Vision·Akash S ChimaSarah J Waugh
Aug 21, 2020·Translational Vision Science & Technology·Ann L WebberEileen E Birch
Dec 22, 2016·Current Opinion in Neurology·Vijay K TailorAnnegret H Dahlmann-Noor
Jul 2, 2019·Therapeutic Advances in Ophthalmology·Marianne E F Piano, Anita J Simmers
Feb 6, 2020·Frontiers in Neuroscience·Yiya ChenRobert F Hess
Sep 25, 2017·Strabismus·Janice Hoole, Natasha Barrow
Nov 13, 2020·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Martin Ming-Leung MaXiang Chen
Feb 12, 2021·Investigative Ophthalmology & Visual Science·Bhagya Lakshmi MarellaShrikant R Bharadwaj
Nov 28, 2020·Translational Vision Science & Technology·Shivalika Sehgal, PremNandhini Satgunam
Oct 8, 2018·Vision Research·Manuela BossiSteven C Dakin
May 1, 2021·Scientific Reports·Wei Hau LewDaniel R Coates

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