Comparing a Home Vision Self-Assessment Test to Office-Based Snellen Visual Acuity

Area of Science:

• Ophthalmology
• Vision Science
• Medical Technology

Background:

• Standard visual acuity testing requires in-office visits.
• Remote patient monitoring is increasingly important in healthcare.
• Developing reliable home-based vision tests can improve accessibility and efficiency.

Purpose of the Study:

• To assess the concordance between a home vision screening test and standard in-office Snellen visual acuity measurements.
• To determine the utility of a home vision test for remote screening and patient triaging.
• To evaluate the potential of home-based vision testing for detecting significant changes in visual acuity.

Main Methods:

• Prospective study involving English-speaking patients with upcoming ophthalmology appointments.
• Home vision test utilized a modified ETDRS chart (PDF format) administered one week prior to in-office visits.
• Primary outcome: mean difference in logMAR visual acuity between home and in-office measurements.

Main Results:

• Analysis included 45 patients (82 eyes), with 45 study eyes analyzed.
• Mean difference between home and in-office visual acuity was -0.02 logMAR (SD 0.15).
• 91% agreement within 0.2 logMAR and 60% agreement within 0.1 logMAR were observed; no significant risk factors influenced differences.

Conclusions:

• Good agreement exists between home-based and in-office Snellen visual acuity tests for patients with vision better than 20/125.
• The home vision test is a viable tool for remote assessment of significant vision changes (>0.2 logMAR).
• This technology supports remote screening and triaging, potentially improving patient access to eye care.