Standardization of Visual Acuity
Quality logMAR VA Charts for Healthcare
Equip your clinic with a digital logMAR VA system
Affordable and easy to implement
logMAR VA Charts
Superior to traditional ETDRS charts
Optonet logMAR visual acuity (VA) charts allows several repeated measures to be taken quickly, to improve precision.
Letters can be changed randomly infinite times, thus avoiding memorization.
Quick repeated measures also enable to identify the patient’s individual criterion for change to monitor VA changes over time.
Optonet does this automatically, calculating mean and standard deviation.
The Vision Unit offers the option of half steps of letter size changes (0.05 log instead of 1.0 log), to increase accuracy.
Preliminary real-world data shows a Test Retest Variability (TRV) of 3.5 ETDRS letters.
Compatibility and Accessibility
It is a progressive hybrid web-based app that can be accessed from any computer or tablet and can be displayed on any conventional computer screen.
It offers an easy automated system to record patient’s answers that is faster and minimizes calculation errors.
VA values can be automatically stored in the patient’s file, thus avoiding transcription errors
Modified procedures can easily be adopted to reduce measurement time.
Both, the automated scoring and storing system also reduce measurement time.
Computer screens provide better background luminance and durability than printed charts on illuminated cabinets.
The Optonet Unit is now compatible with 4K monitors (28″), which can display the same number of 5-letter rows presented in standard ETDRS VA charts, and with image quality akin to backlit ETDRS printouts (the “Gold Standard” for VA measurement until now).
Optonet system in combination with a 4K monitor is probably the most accurate (digital) system available for VA measurement in hospitals and research.
To display the Optonet system, the 28” 4K screen requires a computer (a mini PC* is recommended for its reduced size and price). Android multimedia devices are not compatible.
*Android multimedia devices are not compatible with 4K screens for Optonet VA charts.
The OVU can be displayed on pre-existing equipment; or the clinic can purchase unexpensive equipment, such as an Android TV device (costing around £75) together with a conventional screen (27” size monitor can be found for just £135). A traditional complete ETDRS system with printed letter charts costs around £1,500; and is not as durable.
Follow the link to activate your Optonet Vision Unit