Visiotest - Visual Function Tester by ESSILOR is a compact, lightweight and portable instrument designed to assess the main parameters of visual function at distance and near for screening purposes. The selected tests and optotypes provide good correlation with examination methods used by professionals. Performing the distance and near tests takes an average of about ten minutes per person.

Features and functions:
- Distance vision, monocular checks O. D. and O. S.: acuity measurement, detection of astigmatism and hyperopia with additional lenses
- Distance vision, binocular checks: acuity measurement and stereoscopic vision, ametropic tendency with a bichromatic test, detection of vertical and horizontal phorias, colour perception using ISHIHARA charts
- Near vision, monocular checks O. D. and O. S.: acuity measurement, detection of astigmatism and hyperopia with additional lenses
- Near vision, binocular checks: acuity measurement and stereoscopic vision, ametropic tendency with a bichromatic test and detection of vertical and horizontal phorias
- Patient responses can be recorded on screening forms

Technical specifications:
- Illumination of the luminous field for acuity tests: 320 cd/m2
- Optotype contrast close to 1
- Height-adjustable device
- Weight: 4.9 kg
- Dimensions: D30 x W24,5 x H.37 cm
- Supply voltage: 115/230V - 50/60Hz (dual voltage)
- Power consumption: 10W
- Compliance with standards: CEI 601-1 VDE 0871

Equipment supplied:
- Operator control chart to guide the tests
- User manual, with interpretive and diagnostic information for analysing patient forms

Warnings and limitations:
- Place on a stable surface, such as a table or desk, in a quiet environment suitable for performing the tests
- Avoid exposure to sunlight and proximity to heat sources
- Use in environments with a temperature between 5° and 35°C
- Do not use in very humid environments, given the sensitivity of the microprocessors
- Do not use thinners, solvents or alcohol for external cleaning; follow the enclosed User Manual
- For maintenance, follow the enclosed User Manual
- Specifications are subject to change without notice and do not constitute a contractual obligation