Testing of an automated tablet-based method for the determination of low contrast near visual acuity in ophthalmic patients
Abstract
Purpose
To test an automated, tablet-based self-testing method for the determination of low contrast near visual acuity in ophthalmic patients.
Methods
The Mobile Assessment of Vision by intERactIve Computer (MAVERIC) system consists of a calibrated tablet computer (Samsung Galaxy Tab S 8.4) running purpose-built software housed in a bespoke physical booth. Near low contrast (25%) visual acuity was measured in one eye using the MAVERIC system and a near ETDRS chart at a distance of 40 cm on a population of ophthalmic patients with various retinal conditions. Patients independently completed testing using the MAVERIC system once an explanation of its use had been given. Repeat measures of near acuity were also conducted using the MAVERIC system.
Results
The MAVERIC system displayed excellent repeatability. Bland Altman analysis of data showed reasonable agreement between measurements obtained using MAVERIC and the near ETDRS chart. The degree of difference between data sets was consistent.
Conclusions
This study demonstrates the potential viability of the MAVERIC self-testing system as a means to test low contrast near visual acuity in ophthalmic patients with a high degree of reliability and thus a potential method of both initial assessment and monitoring of near visual acuity in such patients.
