Vision Loss
Conditions
Keywords
Vision loss, Object recognition, Space recognition
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.
Interventions
OTHERvision tests
Sponsors
University Hospital, Lille
Lille Catholic University
Study design
Observational model
CASE_CONTROL
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
ALL
Age
18 Years to 90 Years
Healthy volunteers
Yes
Inclusion criteria
cases: * Patients with eye disease causing loss of central or peripheral vision * French speakers * Age between 18 and 90 years old * Written consent * Health insurance Inclusion Criteria controls: * Sex and age matched controls (+/- 5 years) * French speakers * Normal visual examination with visual acuity of min 9/10
Exclusion criteria
* 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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 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. |
| 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. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Estimation of the score of visual acuity by the logMAR chart | at inclusion | — |
| Measure of lesion size | at inclusion | — |
| 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. |
Outcome results
None listed