Mechanism of crowding in nystagmus
Research type
Research Study
Full title
The selectivity and mechanisms underlying visual crowding in idiopathic nystagmus
IRAS ID
264498
Contact name
John Greenwood
Contact email
Sponsor organisation
UCL Joint Research Office
ISRCTN Number
ISRCTN00000000
Clinicaltrials.gov Identifier
Clinicaltrials.gov Identifier
NA, NA
Duration of Study in the UK
2 years, 0 months, 5 days
Research summary
Congenital nystagmus is a visual disorder characterised by involuntary eye movements, with associated deficits in visual acuity. Another associated visual function that has been found to be impaired is visual crowding - a phenomenon where objects that are visible in isolation become indistinguishable in clutter. Crowding occurs in the peripheral vision of normally sighted individuals. One theory that describes visual crowding is the compulsory integration theory, which proposes that crowding arises when information from target and flankers are integrated due to stimulation of the same large receptive fields. Our aim is to examine whether nystagmic crowding shares a common mechanism with crowding in the peripheral vision of normal sighted people. We will test this possibility by examining whether the properties of nystagmic crowding match those of the unaffected periphery. In doing so we aim to determine both how and why this process affects nystagmic vision.
REC name
North West - Liverpool Central Research Ethics Committee
REC reference
19/NW/0533
Date of REC Opinion
17 Sep 2019
REC opinion
Further Information Favourable Opinion