What is IVI-CAT?
IVI-CAT is a computerized adaptive testing (CAT) system that measures the impact of vision impairment on vision-related quality of life.
The IVI-CAT is based on the original 28-item paper-pencil IVI questionnaire, and the CAT algorithms were developed using data from patients with vision impairment and low vision.
IVI-CAT provides precise measurement vision-related quality of life using only 5–10 items, a reduction in items of 65-82% from the original paper-pencil IVI.
Domains and items in IVI-CAT
IVI-CAT provides precise measurement of overall
vision-specific quality of life and two sub-domains.
Vision-related quality of life
Items
Items
Activities of daily living and emotional well-being, as they are affected by vision
Vision-specific functioning
Items
Items
Restriction on participation in important activities of daily living
Emotional well-being
Items
Items
Emotional reactions and psychological effects
Publications
Main Publication
Development, psychometric testing and CAT simulations using data from over 800 patients with vision impairment.
Utilisation
IVI-CAT is currently being implemented in cataract clinics at the Singapore National Eye Centre to measure the impact of vision impairment and cataract surgery on vision-related quality of life.
