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Vision screening using the Acuidrive device
David A Atchison1, Barsha Lal1, Katrina L Schmid1
1Centre for Vision and Eye Research, Queensland University of Technology, Kelvin Grove, Queensland, Australia.
Clinical & Experimental Optometry
|February 13, 2024
Summary
The Acuidrive device shows potential for roadside vision screening, though it slightly underestimates visual acuity compared to the ETDRS chart. Refinements could make this handheld device a viable tool for identifying drivers who may not meet vision standards.
Area of Science:
- Ophthalmology
- Vision Science
- Public Health
Background:
- The Acuidrive is a handheld, self-illuminated device for roadside visual acuity screening.
- It aims to identify drivers potentially failing to meet vision standards, presenting targets binocularly with lenses to negate accommodation.
- This study validates the Acuidrive against the Early Treatment of Diabetic Retinopathy Study (ETDRS) chart.
Purpose of the Study:
- To investigate the validity and applicability of the Acuidrive vision screening device.
- To compare Acuidrive's performance against the established ETDRS chart.
Main Methods:
- 36 participants (18-30 and 50-70 years) underwent binocular visual acuity testing.
- Testing used both the Acuidrive device and an ETDRS chart on a monitor.
- Eyes were corrected, and four blur levels (+0.00 to +1.50 DS) were applied. Luminance was standardized at ~100 cd/m².
Main Results:
- The Acuidrive device consistently underestimated ETDRS visual acuity by 0.24±0.07 logMAR (lights on) and 0.18±0.10 logMAR (lights off).
- A screening threshold of 0.50 logMAR on the Acuidrive demonstrated high sensitivity (85-86%) and specificity (78-79%) for detecting visual acuity poorer than 0.34 logMAR.
- Older adults exhibited slightly better visual acuity (~0.10 logMAR) than younger adults.
Conclusions:
- A consistent 0.2 logMAR (two lines) offset exists between Acuidrive and ETDRS chart measurements.
- The Acuidrive device shows promise as a screening tool, but requires constructional refinements for optimal performance.
