A large population-based study in Korea by Park et al1 examined the effects of chronic diseases on health-related quality of life of adults. The authors compared those with chronic diseases with those with both vision loss and chronic diseases. The study used the EQ-5D, a health-related quality-of-life tool that rates the impact of disease on a scale of 0 to 1 with a lower score indicating greater effect of the health condition. The EQ-5D has 5 dimensions—mobility, self-care, usual activities, pain or discomfort, and anxiety or depression. Vision was assessed and people were grouped as having no vision impairment with visual acuity of 6/12 or better or mild (<6/12) or moderate vision impairment (<6/18).
Keeffe JE. Vision Impairment and Chronic Health ConditionsImplications for Services. JAMA Ophthalmol. 2015;133(11):1275-1276. doi:10.1001/jamaophthalmol.2015.3494