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Original Investigation
May 21, 2020

Association of Visual Acuity Improvement With Uncorrected Refractive Error in Patients New to Low Vision Clinics

Author Affiliations
  • 1Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland2Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
JAMA Ophthalmol. Published online May 21, 2020. doi:10.1001/jamaophthalmol.2020.1677
Key Points

Question  What is the association of visual acuity improvement and uncorrected refractive error in patients with ocular disease who are new to low vision clinics?

Findings  In this cases series, 27.8% of patients with mean visual acuity of 20/100 had at least 2-line acuity improvement; this finding was more likely seen in working-age adults aged 40 to <65 years, African American patients, or those with moderate vision impairment.

Meaning  The findings suggest that refractive evaluation should be emphasized in patients under care for ocular disease.

Abstract

Importance  There is substantial socioeconomic and individual burden from uncorrected refractive error (URE) and chronic ocular disease. Understanding the association of visual acuity (VA) reduction with URE and the adults most likely to benefit from refraction may help support clinical decision-making in ophthalmologic care and maximize patient outcomes.

Objectives  To assess the magnitude of VA improvement associated with URE among adults under ophthalmic care who obtain low vision rehabilitation (LVR) services and identify the characteristics of the patients who are most likely to experience improvement.

Design, Setting, and Participants  This retrospective case series assessed patients 20 years or older who were new to the LVR clinics from August 1, 2013, to December 31, 2015, and who had habitual VA between 20/40 and counting fingers (not including) and underwent refraction. Data analysis was performed from April 4, 2018, to December 20, 2019.

Exposures  Patient demographics and clinical data, including habitual and refraction VA, refraction, and disease diagnosis. Habitual VA was categorized as mild (VA worse than 20/40 and at least 20/60), moderate (VA worse than 20/60 and better than 20/200), severe (VA 20/200 or worse and better than 20/500), and profound (VA 20/500 or worse) vision impairment (VI).

Main Outcomes and Measures  At least 2-line VA improvement and any VA improvement (≥1-line) by refraction.

Results  Among the 2923 patients new to LVR clinics, 1773 (mean [SD] age, 70 [18.2] years; 1069 [60.3%] female) were included in these analyses. The mean habitual VA was 20/100 (mean [SD], 0.67 [0.36] logMAR). At least 2-line improvement was observed in 493 patients (27.8%), and any VA improvement was seen in 1023 patients (57.7%). At least 2-line improvement was observed in 54 patients (34.8%) with corneal disorders and was more likely seen among patients aged 40 to <65 years compared with those aged 20 to <40 years (odds ratio [OR], 1.57; 95% CI, 1.02–2.41), African American patients compared with white patients (OR, 1.41; 95% CI, 1.08-1.85), or patients with moderate VI compared with mild VI (OR, 1.36; 95% CI, 1.07-1.72).

Conclusions and Relevance  The findings suggest that URE is prevalent among patients with ocular disease and accessing LVR and that refractive evaluation should be considered for patients with ocular disease and reduced VA, especially working-age adults aged 40 to <65 years, African American patients, and those with moderate VI.

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