Visual impairment among Aboriginal and Torres Strait Islander patients attending an Australian Indigenous primary health service: a cross-sectional study

This cross-sectional study aimed to identify the period prevalence of visual impairment (VI) and blindness among Aboriginal and Tones Strait Islander people attending an Indigenous urban primary healthcare service, eye care practitioner referrals for those with VI and any opportunities to improve care delivery. Visual acuity (VA) examinations, using a Snellen chart, are performed as part of routine annual health assessments offered to children and adults. This study included patients aged >= 5 years (n = 1442) who had a health assessment conducted between 1 January 2015 and 31 December 2016 and provided consent for the use of their health assessment information for research. Of patients with available data, 2.4% (33/1374) experienced VI, defined as presenting VA worse than 6/12 to 6/60 in the better-seeing eye. VI was more common in those aged >= 60 years (14/136; 10.3%) and was significantly associated with increasing age (P < 0.001). No patients experienced blindness, defined as presenting VA worse than 6/60 in the better-seeing eye. All patients with VI were aged >= 16 years. Nine (27%) of the 33 patients with VI in the better-seeing eye were referred to an optometrist or an ophthalmologist. The low period prevalence of VT and no blindness in this study are positive findings. The findings also indicate that routine VA testing of older adults, especially those aged >= 60 years, should be conducted to avoid missing those not having an annual health assessment.