Innovative, Electronic, Mobile and Wearable System of Adaptive Lenses.

Technology Evolution in Subjective Refraction

Subjective Refraction began a long time ago using trial frames with trial lenses. Manual and automated phoropters were then developed to speed up the process at the cost of less freedom for the patient and other disadvantages. VisionFit brings subjective refraction back to the trial frames modality and well combines the advantages of both methodologies (speed of operation and maximum freedom for the patient).


Revolutionizing the Measurement of Subjective Refraction

VisionFitTM is an innovative electronic, tunable, all-in one, solid state, mobile and wearable system of lenses. It performs a subjective sight examination and it effectively replaces both the trial glasses and the manual/electronic phoropter functionality.

The Objective and Subjective Refraction Exam

By using the VisionFit in combination with Adaptica’s 2WIN binocular handheld refractometer and vision analyzer, the operator performs an objective and subjective refraction exam in a few minutes only, with maximum mobility and flexibility.

The system provides final guidance for the production of standard and customized prescription lenses and also allows subjective refraction to be performed in association with other biomedical devices (e.g. stabilometric platform) and with other devices used by the patient.



VisionFit effectively combines all the features and advantages of both the trial frame and the manual/automated phoropters.

  • Wearable and mobile – it fits just like a trial frame.
  • Enables examining in free posture.
  • Small footprint and reduced exam time.
  • It increases peripheral vision.
  • Doesn’t require control of the patient’s position.
  • Ideal with non-cooperative patients.
  • Connectivity, broad recording and printing capabilities.
  • Adjustable step resolution down to 0.05 D (spherical lens).
  • Same standards of speed, fluidity and symmetry of digital phoropters.
  • Subjective refraction can be performed with the patient in his/her usual working environment and posture.
  • The aberration lens extends the accuracy of the correction thanks to a high order aberration system.
  • Does not require any infrastructure nor any special installation procedure.
  • Subjective refraction can be performed in association with other biomedical devices (e.g., stabilometric platform).
  • Subjective refraction can be performed in association with other devices in use by the patient (e.g., bite, planters).

Operating VisionFit

VisionFit features a self-calibration procedure to ensure accuracy and reliability. It does not require any special installation procedure.

  1. The patient wears the VisionFit lens frame like a regular trial frame and looks through it at an eye chart – or any other near or far target.
  2. The patient can be sitting, standing or in any other desired position and/or environment.
  3. The eye chart and/or target can be placed at different distances, depending on the type of exam.
  4. The operator adjusts the device in order to change the position and configuration of the optics, asking the patient for a subjective feedback.
  5. The operator selects the output values for both glasses and contact lenses prescriptions.
  6. VisionFit provides versatile prescription printing options.

The Electronic Trial Frame

VisionFit includes a computer integrated control unit featuring a display screen, keyboard controller, commands and connectivity capabilities. The wearable electronic trial frame features two tunable lens sets each composed of three adaptive lenses (spherical, cylindrical and aberration) with add-on lens support.

Wearing the VisionFit electronic trial frame as a traditional trial frame, the subject looks at the eye chart or any other near or far target in any environment, either sitting or standing, thus allowing subjective refraction to be performed with the subject in his/her usual working environment and posture.

Thanks to VisionFit lens technology, the subject can also move around with no operator intervention.

  1. Bridge height adjustment
  2. Vertex distance adjustment
  3. Pupil distance adjustment
  4. Pantoscopic tilt
Adjustable Helmet and Regular trial frame configuration with Velcro strap


The electronic trial frame comes in two solutions:

  • Adjustable Helmet
  • Regular trial frame configuration with Velcro strap

VisionFit Adaptive Technologies

The wearable trial frame; each tunable lens set includes a stack of 4 elements:

  • Adaptive Spherical Lens
  • Adaptive Cylindrical Lens
  • Adaptive Aberration Lens
  • Additional Lens Support

The adaptive lenses of the stack are electronically tuned by the Control Unit without any other operator action.


visionfit-circle-diagram1The Adaptive Lenses Stack

  1. Adaptive Spherical Lens
  2. Adaptive Cylindrical Lens
  3. Adaptive Aberration Lens

visionfit-circle-diagram2VisionFit Aberration Lens

Aberration lens technology: liquid lens with 32 transparent actuators on a glass surface; this improves the performance of the optical system to correct aberrations.

  1. Glass (electrostatic effect)
  2. Transparent actuators layer
  3. Membrane
  4. Liquid lens, flow pressure

The Control Unit

The Control Unit is a tabletop driver featuring a computer-integrated unit, a display, keyboard controller commands and connectivity capabilities.

  1. On-off / Clear
  2. Save / Print
  3. Menu
  4. Shift
  5. Tab
  6. Both Eyes
  7. Right Eye
  8. Left Eye
  9. Sphere
  10. Cylinder
  11. Axis
  12. Addition
  13. Fog / Retinoscopy Function
  14. Cross Cylinder Function
  15. External Chart Buttons

How to Read the Display

VisionFit features a self-calibration procedure to ensure accuracy and reliability.

  1. Values from 2WIN – Autoref
  2. Right Eye Indicator
  3. Left Eye Indicator
  4. Pupillary Distance
  5. Vertex Distance
  6. Sphere
  7. Cylinder
  8. Axis
  9. Addition
  10. Visual Acuity
  11. Fogging
  12. Axis / Cross Cylinder Fields
  13. WiFi activity flag
  14. Adaptive lenses status flag


VisionFit™ – the unique wearable adaptive refractor for the most advanced subjective sight examination.

Subjective refraction measurement.
Determination of corrective data for refraction anomalies and binocular functions as the basis for manufacturing glasses and contact lenses.
Use in refraction rooms in clinics, physicians’, optometrists’ or opticians’ practices.
Operation by physicians, optometrists, opticians or properly trained clinical personnel.
Spherical correction
-10/+10 D and -20/+20 D with the use of an additional lens with prescription steps of 0.125 D and variable fluidity steps (adjustable from 0.05 to 0.25 D) with the use of the basic spherical lens
Cylindrical correction Range0 to 10 D by steps of 0.25 D
Axis adjustment range1-180° by steps of 1°
Additional prismatic lenses range (optional)
0 to 10 ∆, steps 1 ∆ (add on – no automatic)
Corneal vertex distance range
10-18 mm
Manual pupil distance adjustment range
50-80 mm, separated right and left
Device free aperture
Displaycolor LCD, 3.5 inches
WiFi ModuleRadicom, model: WiFiHU-a
Bluetooth Module
IDATA, USB 2.0 Bluetooth Mini Class 2+EDR
Power requirementVoltage: 100-240 VAC, 50-60 Hz

Power consumption: 60 VA
File Description File size
pdf VisionFit Brochure EN L 151221 1 MB
pdf VisionFit Brochure IT L 151109 1 MB