Related Experiment Video
Updated: Mar 6, 2026

Subjective Refraction Test Using a Smartphone for Vision Screening
Published on: October 18, 2024
Understanding the Knowledge Gap Experienced by U.S. Safety Net Patients in Teleretinal Screening
Sheba M George1, Erin Moran Hayes2, Allison Fish3
1Charles R. Drew University, Los Angeles, CA; UCLA, Los Angeles, CA.
Abstract:
Safety-net patients' socioeconomic barriers interact with limited digital and health literacies to produce a "knowledge gap" that impacts the delivery of healthcare via telehealth technologies. Six focus groups (2 African- American and 4 Latino) were conducted with patients who received teleretinal screening in a U.S. urban safety-net setting. Focus groups were analyzed using a modified grounded theory methodology. Findings indicate that patients' knowledge gap is primarily produced at three points during the delivery of care: (1) exacerbation of patients' pre-existing personal barriers in the clinical setting; (2) encounters with technology during screening; and (3) lack of follow up after the visit. This knowledge gap produces confusion, potentially limiting patients' perceptions of care and their ability to manage their own care. It may be ameliorated through delivery of patient education focused on both disease pathology and specific role of telehealth technologies in disease management.

