Essilor Vision-R 800 Refraction System
With VISION-R 800, you enter in a new era of refraction
For many years, subjective refraction techniques have not changed that much. They always consisted of presenting lenses in different powers, in an organized manner, in front of the patient’s eyes and recording the patient's answers. It usually resulted in a prescription that was just an estimate of what was required.
The phoropter’s continuous power changes make refraction more precise and easier to perform, resulting in more accurate prescriptions for patients… and helping them discover the full potential of their vision!
AN EXCLUSIVE OPTICAL MODULE PRODUCING INSTANTANEOUS AND CONTINUOUS POWER CHANGES
VISION-RTM 800 CONTAINS A BREAKTHROUGH TECHNOLOGY:
A patented automated optical module powered by digitally-controlled motors
Providing simultaneous and instantaneous changes of sphere, cylinder and axis
A sphere range from -20.00 D to +20.00 D in 0.01D increments
A cylinder range up to 8.00 D in 0.01 D increments
An axis range from 0° to180° in 1° steps
In the traditional refraction process, practitioners successively look for sphere power, cylinder axis and cylinder power individually… despite the fact that these three components are inter-related. As a consequence, sphere has to be readjusted after the determination of the cylinder.
With the VISION-R 800 optical module, all refraction components can vary simultaneously. For instance, the sphere is automatically adjusted for each change in cylinder power so as to maintain a constant spherical equivalent throughout the refraction procedure.
DIGITAL INFINITE REFRACTION
Although refraction is traditionally described in terms of the sphere power, cylinder axis and cylinder power, it can also be described in a so-called “Dioptric Space” by three components: the spherical equivalent, the cylinder value at 0° and the cylinder value at 45°, all three being expressed in consistent dioptric units.
In this Dioptric Space, the traditional refraction process looks like a discontinued search in different directions to reach the final refraction. With the new optical module, the Digital Infinite RefractionTM procedure consists of a more direct route to the final refraction thanks to a simultaneous variation of all components... Refraction is therefore much quicker!