Digital Snellen chart test for pre-employment vision screening. Tests right eye, left eye, and binocular vision. Results in 6/x notation. Calibrated for screen size. Suitable for driving, machinery, and visual safety roles.
Overview
Visual acuity — the ability to resolve fine detail — is a critical safety requirement for many occupations. Drivers, heavy machinery operators, forklift operators, process workers, and certain healthcare roles all require minimum visual acuity standards. The Snellen chart, with its progressively smaller letter rows, has been the standard measurement tool for over 150 years.
Refchecks delivers a digital Snellen chart assessment that tests each eye independently and binocularly. The chart is calibrated to the candidate's screen size and viewing distance, ensuring consistent letter sizing regardless of device. Results are expressed in the standard 6/x notation (e.g., 6/6 for normal acuity, 6/12 where the candidate can read at 6m what a person with normal vision reads at 12m).
The assessment tests three conditions: right eye alone, left eye alone, and both eyes together. This identifies candidates who may compensate effectively with binocular vision but have significant asymmetry between eyes — which is relevant for certain licensed roles.
What's Included
Screen-size calibration ensures the chart renders at correct physical dimensions regardless of the candidate's device. Viewing distance is set by the candidate following on-screen instructions.
Tests right eye, left eye, and binocular vision separately. Identifies asymmetry between eyes that binocular compensation may mask.
Results expressed in universal Snellen notation. Easy to interpret against employer or regulatory minimum vision standards.
Candidates complete the assessment on their own device from any location. Screen calibration instructions ensure accuracy without specialist equipment.
Results for all three tests are delivered to the employer dashboard immediately. Reports can be attached to candidate files for compliance records.
Process
The candidate follows on-screen instructions to calibrate viewing distance and confirm screen size. This ensures chart letters render at the correct physical size.
The candidate covers their left eye and reads progressively smaller letter rows until they cannot resolve the characters accurately.
The process is repeated for the left eye. The lowest row read correctly determines the Snellen score for each eye.
Both eyes are tested together. The system calculates the 6/x score for each condition and delivers a combined report to the employer dashboard.
Turnaround & Pricing
Turnaround Time
Immediate upon candidate submission
Per assessment
From $15
Bundled with colour vision test at a discounted rate.
FAQ
Related Services
Join recruitment teams who have simplified their verification process. Start your free trial today — no credit card required.