Perception of Objects and Natural Scenes in People With Vision Loss (ACTIVIS)
- Conditions
- Vision Loss
- Interventions
- Other: vision tests
- Registration Number
- NCT02862405
- Lead Sponsor
- Lille Catholic University
- Brief Summary
The loss of central vision causes difficulty not only in reading but also in faces recognition, and in particular in the identification of facial expression, objects or spaces. These visual deficits have been mainly studied in relation with reading, which is the main complaint of these kind of patients. However, there are not enough data regarding perception of objects and spaces in this population. Then, the objectives are to study the visual-spatial abilities in individuals with vision loss, and altered cognitive processes, (2) to develop clinics tools for early detection and quantification of visual-spatial deficits and (3)to understand the capacities of normal peripheral vision in order to test the possibility of potential training for use of peripheral vision when central vision is impaired by an ophthalmic pathology.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 260
Not provided
- Psychiatric disease or neurological pathologies
- Communication difficulties (deafness / mutism)
- Drug treatment altering concentration
- Mental deterioration with MMS <24
- Alcoholism or addiction to drugs
- Persons under guardianship
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Arm && Interventions
Group Intervention Description Control group vision tests Patients without loss of vision. Patients with loss of central vision vision tests Patients coming in ophthalmic consultation will be selected for the study. The diagnosis of this disease is based on clinical examination, and imaging of the retina.Patients with only loss of central vision will be selected. Patients with loss of peripheral vision vision tests Patients coming in ophthalmic consultation will be selected for the study. Patients with loss of peripheral vision will be selected on the bases of presence of tunnel vision.
- Primary Outcome Measures
Name Time Method Comparison of performances in visual tests between different groups according to answer time at inclusion These behavioral studies include a series of short tests of 5 to 10 minutes each (not exceeding 60 minutes with breaks and instructions) in which photos of scenes or isolated objects will be presented in central or peripheral vision using a computer screen or a panoramic screen covering a 180° field.
Comparison of performances in visual tests between different groups according to error rate at inclusion These behavioral studies include a series of short tests of 5 to 10 minutes each (not exceeding 60 minutes with breaks and instructions) in which photos of scenes or isolated objects will be presented in central or peripheral vision using a computer screen or a panoramic screen covering a 180° field.
- Secondary Outcome Measures
Name Time Method Pearson correlation coefficient to determine the correlation between the performance parameters during visual tests (error rate and answer time) and clinical parameters (visual acuity and lesion size) at inclusion These behavioral studies include a series of short tests of 5 to 10 minutes each (not exceeding 60 minutes with breaks and instructions) in which photos of scenes or isolated objects will be presented in central or peripheral vision using a computer screen or a panoramic screen covering a 180° field.
Estimation of the score of visual acuity by the logMAR chart at inclusion Measure of lesion size at inclusion