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Repetitive visual cortex transcranial random noise stimulation in adults with amblyopia.

Author(s): Donkor R, Silva AE, Teske C, Wallis-Duffy M, Johnson AP, Thompson B

We tested the hypothesis that five daily sessions of visual cortex transcranial random noise stimulation would improve contrast sensitivity, crowded and uncrowded visual acuity in adults with amblyopia. Nineteen adults with amblyopia (44.2?±?14.9 years, 10 ...

Article GUID: 33542265
Assessing optimal colour and illumination to facilitate reading.

Author(s): Morrice E, Murphy C, Soldano V, Addona C, Wittich W, Johnson AP

PURPOSE: This study examined the effectiveness of the LuxIQ, the Apple iPad and a smart bulb in assessing optimal colour and illumination to facilitate reading in younger, older and visually impaired adults. METHODS: Participants read standardised texts at ...

Article GUID: 33533095
Congenital Deafness Leads to Altered Overt Oculomotor Behaviors.

Author(s): Sharp A, Turgeon C, Johnson AP, Pannasch S, Champoux F, Ellemberg D

Front Neurosci. 2020;14:273 Authors: Sharp A, Turgeon C, Johnson AP, Pannasch S, Champoux F, Ellemberg D

Article GUID: 32327967
Music predictability and liking enhance pupil dilation and promote motor learning in non-musicians.

Author(s): Bianco R, Gold BP, Johnson AP, Penhune VB

Sci Rep. 2019 Nov 19;9(1):17060 Authors: Bianco R, Gold BP, Johnson AP, Penhune VB

Article GUID: 31745159
Spatial summation of broadband contrast.

Author(s): Richard B, Hansen BC, Johnson AP, Shafto P

J Vis. 2019 May 01;19(5):16 Authors: Richard B, Hansen BC, Johnson AP, Shafto P

Article GUID: 31100132
Title:Repetitive visual cortex transcranial random noise stimulation in adults with amblyopia.
Authors:Donkor R,  Silva AE,  Teske C,  Wallis-Duffy M,  Johnson AP,  Thompson B
Link:https://www.ncbi.nlm.nih.gov/pubmed/33542265
DOI:10.1038/s41598-020-80843-8
Category:Sci Rep
PMID:33542265
Dept Affiliation: PSYCHOLOGY
1 Department of Optometry and Vision Science, University of Waterloo, 200 University Avenue West, Waterloo, ON, N0B 2T0, Canada.
2 Department of Psychology, Concordia University, Montreal, Canada.
3 Réseau de Recherche en Santé de la Vision, Montreal, Canada.
4 CRIR/Lethbridge-Layton-Mackay Rehabilitation Centre du CIUSSS du Centre-Ouest-de-l'Île-de-Montréal, Montreal, Canada.
5 Department of Optometry and Vision Science, University of Waterloo, 200 University Avenue West, Waterloo, ON, N0B 2T0, Canada. ben.thompson@uwaterloo.ca.
6 Center for Eye and Vision Research, Hong Kong, China. ben.thompson@uwaterloo.ca.
7 The Liggins Institute, University of Auckland, Auckland, New Zealand. ben.thompson@uwaterloo.ca.

Description:

Repetitive visual cortex transcranial random noise stimulation in adults with amblyopia.

Sci Rep. 2021 Feb 04; 11(1):3029

Authors: Donkor R, Silva AE, Teske C, Wallis-Duffy M, Johnson AP, Thompson B

Abstract

We tested the hypothesis that five daily sessions of visual cortex transcranial random noise stimulation would improve contrast sensitivity, crowded and uncrowded visual acuity in adults with amblyopia. Nineteen adults with amblyopia (44.2?±?14.9 years, 10 female) were randomly allocated to active or sham tRNS of the visual cortex (active, n?=?9; sham, n?=?10). Sixteen participants completed the study (n?=?8 per group). tRNS was delivered for 25 min across five consecutive days. Monocular contrast sensitivity, uncrowded and crowded visual acuity were measured before, during, 5 min and 30 min post stimulation on each day. Active tRNS significantly improved contrast sensitivity and uncrowded visual acuity for both amblyopic and fellow eyes whereas sham stimulation had no effect. An analysis of the day by day effects revealed large within session improvements on day 1 for the active group that waned across subsequent days. No long-lasting (multi-day) improvements were observed for contrast sensitivity, however a long-lasting improvement in amblyopic eye uncrowded visual acuity was observed for the active group. This improvement remained at 28 day follow up. However, between-group differences in baseline uncrowded visual acuity complicate the interpretation of this effect. No effect of tRNS was observed for amblyopic eye crowded visual acuity. In agreement with previous non-invasive brain stimulation studies using different techniques, tRNS induced short-term contrast sensitivity improvements in adult amblyopic eyes, however, repeated sessions of tRNS did not lead to enhanced or long-lasting effects for the majority of outcome measures.

PMID: 33542265 [PubMed - in process]