100
Participants
Start Date
June 1, 2019
Primary Completion Date
May 30, 2026
Study Completion Date
May 30, 2026
Life Space Questionnaire
This 9-item questionnaire is interested in finding out how much a person gets out and about and the spatial extent of the person's typical life space, i.e., what is the usual range of places in which the person engages in activities within the designated time frame.
Low Luminance Questionnaire
This 32-item questionnaire is interested in finding out problems that involve vision under different lighting conditions or feelings that people have about your vision under different lighting conditions.
Contrast sensitivity under dim illumination
Participants will be presented with visual targets of different contrast under dim illumination and asked to report when they see the target.
Visual field under dim illumination (MAIA)
Sensitivity in the central visual area will be assessed under dim illumination
Macular Pigment Optical Density (MPOD)
Participants will be asked to look at a fixation target and the density of their macular pigment will be assessed.
Dark Adaptation
After adapting to a dark environment, participants will be exposed a bright flask of light. the time needed for them to recover their sensitivity will be measured.
RECRUITING
University of Alabama Birmingham, Birmingham
University of Alabama at Birmingham
OTHER