Role of Peripheral Vision in Scene Perception (PERISCE)
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Psychophysical evaluation.
- Who it may be relevant to
- Registry conditions: Primary Open-angle Glaucoma (POAG). Basic parameters: 18 years — 80 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Center list to be confirmed — check the primary protocol.
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
Unsure about the terms? Read our patient guide →
Official title
Role of Peripheral Vision in Scene Perception
Overview
Despite its low spatial resolution, peripheral vision is very useful for rapidly categorizing a visual scene. Low spatial frequencies of a visual stimulus available in peripheral vision would allow a coarse categorization of the scene and objects (deciding, for example, whether it is an urban or natural landscape). This first representation would then trigger predictive mechanisms which would subsequently guide a more detailed visual analysis in central vision. The psychophysical studies that the investigators have already conducted in this scientific context has been carried out under normal vision conditions. The objective of this project is to study the influence of peripheral vision on central vision with an original approach: What are the consequences of a loss of peripheral vision on the processing performed in central vision? The project will concern patients with glaucoma. This ophthalmic pathology particularly affects the peripheral retina and thus represents a good pathological cognitive model of a visual recognition system in which peripheral vision is less important. The investigators will conduct psychophysical studies with glaucomatous patients and healthy volunteers with normal vision. All participants will be required to perform a short experiment on a computer (15 minutes) where they will look at different photographs of scenes of different luminance and spatial frequencies. Participants will have to perform various tasks on these images using the keys on the keyboard.
Interventions
- Behavioral Psychophysical evaluation
All participants will be required to perform a short experiment on a computer (15 minutes) where they will look at different photographs of scenes of different luminance and spatial frequencies. They will have to perform various tasks on these images using the keys on the keyboard.
Primary outcome measures
- Psychophysical measure : Percentage of correct response [Time frame: Through study completion of 45 months]
- Psychophysical measure : Mean reaction time in milliseconds [Time frame: Through study completion of 45 months]
Eligibility criteria
Inclusion criteria
For patients :
- between 18 and 80 years old
- stable bilateral primary open angle glaucoma (POAG)
- visual acuity > 5/10 for distant vision for the eye tested
- peripheral visual field defect on the eye tested measured through a Humphrey Visual Field Analyzer
For healthy volunteers :
- between 18 and 80 years old
- visual acuity > 5/10
- absence of ophthalmologic disease other than Glaucoma (age-related macular degeneration, cataract except for uncomplicated cataract surgery, amblyopia, optic neuropathy, diabetic retinopathy …)
Exclusion criteria
- ophthalmologic disease other than Glaucoma (age-related macular degeneration, cataract except for uncomplicated cataract surgery, amblyopia, optic neuropathy, diabetic retinopathy …)
- treated with medication that might compromise sustained attention (benzodiazepine, narcoleptics)
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: Yes
Study design
- Observational model
- Case-control
Study locations
Center list to be confirmed — check the primary protocol.
Publications
- Roux-Sibilon A, Rutge F, Aptel F, Attye A, Guyader N, Boucart M, Chiquet C, Peyrin C. Scene and human face recognition in the central vision of patients with glaucoma. PLoS One. 2018 Feb 26;13(2):e0193465. doi: 10.1371/journal.pone.0193465. eCollection 2018. PMID 29481572
- Roux-Sibilon A, Trouilloud A, Kauffmann L, Guyader N, Mermillod M, Peyrin C. Influence of peripheral vision on object categorization in central vision. J Vis. 2019 Dec 2;19(14):7. doi: 10.1167/19.14.7. PMID 31826252
- Peyrin C, Roux-Sibilon A, Trouilloud A, Khazaz S, Joly M, Pichat C, Boucart M, Krainik A, Kauffmann L. Semantic and Physical Properties of Peripheral Vision Are Used for Scene Categorization in Central Vision. J Cogn Neurosci. 2021 Feb 11:1-15. doi: 10.1162/jocn_a_01689. Online ahead of print. PMID 33571079
Identifiers
NCT: NCT05539508 · 2021-A01986-35