[Setting the preferential retinal locus. Part 2. When, Where, and how does it become established?].

Area of Science:

• Ophthalmology and Vision Science
• Neuroscience
• Rehabilitation Medicine

Context:

• Understanding the preferred retinal locus (PRL) is crucial for visually impaired individuals.
• Previous research has explored PRL localization but lacked comprehensive analysis.
• This study investigates PRL positioning in relation to visual field defects and damage severity.

Purpose:

• To determine the relationship between the severity of visual impairment and the location of the PRL.
• To propose new hypotheses for PRL localization mechanisms in low-vision patients.
• To inform rehabilitation strategies for optimizing visual function in the partially sighted.

Summary:

• A study of 100 partially sighted individuals utilized scanning laser ophthalmoscopy and angiofluorography to map PRL relative to the fovea.
• PRL position correlated with scotoma size and visual damage: slight damage showed left/superior PRL, worsening damage favored right, and severe damage indicated superior/right PRL.
• These findings suggest that PRL locations are consistently available for individuals and depend on the extent of vision loss.

Impact:

• The findings provide a basis for tailored visual rehabilitation programs, emphasizing training the superior and right visual fields.
• Recommendations include integrating visual information processing in cerebral locations suited for low spatial frequencies and peripheral vision.
• This research aids in developing effective strategies to enhance the daily visual activities and overall quality of life for people with low vision.