Revised Self-Report Assessment of Functional Visual Performance (R-SRAFVP)-Part II: Construct Validation.

Area of Science:

• Ophthalmology
• Gerontology
• Rehabilitation Science

Background:

• Low vision in older adults significantly impacts daily living activities.
• Age-related eye diseases are a primary cause of vision impairment in the elderly.
• Accurate assessment tools are crucial for effective rehabilitation and support.

Purpose of the Study:

• To validate the construct of the Revised Self-Report Assessment of Functional Visual Performance (R-SRAFVP).
• To assess the reliability and validity of the R-SRAFVP for older adults with low vision.
• To evaluate the R-SRAFVP's utility in measuring functional visual performance in this demographic.

Main Methods:

• A 50-item draft of the R-SRAFVP was administered to 87 older adults with low vision.
• Construct validation employed principal-components analysis and the known-groups method.
• Reliability was assessed using Cronbach's alpha.

Main Results:

• Principal-components analysis identified nine components and a 33-item scale.
• Cronbach's alpha demonstrated high reliability (overall α = .92; component α = .72–.84).
• Known-groups comparisons confirmed validity, showing greater task difficulty in participants with severe vision loss.

Conclusions:

• The 33-item R-SRAFVP is a reliable and valid instrument.
• It effectively evaluates the ability of older adults with low vision to perform vision-dependent daily activities.
• The R-SRAFVP supports the assessment of functional visual performance in clinical and research settings.