QuickSee Free Pro Keratometry logo
QuickSee Free Pro handheld autorefractor and keratometer


QuickSee Free Pro Keratometry logo

Cutting-edge autorefraction and keratometry at hand


Strongly agrees with subjective refraction

Cutting-edge design

Modern operator and patient experience

Easy to use

Intuitive design and controls

QuickSee Free Pro measuring a patient
QuickSee Free Pro results

QuickSee Free Pro’s combination of the open view design, wavefront aberrometry, and innovative measurement algorithms produces clinically accurate autorefraction results, comparable to the best desktop autorefractors but in a compact, handheld format.

The patented PlenOptika Wavefront Refraction Engine™  precisely determines low-order refractive errors, demonstrating excellent agreement with subjective refraction.

QuickSee Free Pro’s technology has been clinically-evaluated in five IRB-based studies and documented in many peer-reviewed publications and conference abstracts. QuickSee Free has FDA Class I 510(k) exempt medical device registration.

Research and design supported in part by
TRISH logo
TRISH logo

QuickSee Free Pro advantages

Image of QuickSee screen while acquiring measurement
Screenshot of QuickSee Free Pro results display
Keratometry results preview

QuickSee Free Pro’s UI is clean, intuitive, and robust

Friendly to all kinds of patients
  • Accessible for patients with mobility issues and/or physical challenges (ADA Compliant)
  • Works with bedbound patients
  • Fogging lenses for pediatric exams
Easy to learn and use
  • Operators can be up and running in minutes
  • Pupil camera aids alignment
  • Accelerates subjective refraction with a more accurate starting point
Strong agreement with subjective refraction
  • <= 0.25 D: 70-75% of patients
  • <= 0.5 D: 80-90% of patients (see publications)
Field durable
  • Calibration free
  • Operates in humid and dusty environments
  • Can be used indoors and outdoors, in most light settings
  • Includes hardened carrying case
  • Up to 8 hours continuous use on battery, operates while tethered for charging

Technical specifications

Pupil size2 to 8 mm
Intended patient population>= 3 years
Accommodation control Open view, Fogging lens (optional)
Cycloplegia requirementNone
Dilation requirementNone
Illumination requirementNone
Acquisition time5, 10 seconds
Spherical range-13D to +10D, increments of 0.01D, 0.125D, 0.25D
Cylindrical range-8D to +8D, increments of 0.01D, 0.125D, 0.25D
Axial range0–180º, increments of 1º, 5º, 10º
Base technology Wavefront aberrometry
Radius of curvature5 to 12 mm in 0.01 mm increments
Corneal astigmatism0 D to +/- 8 D (R 5 to 12mm)
CenterDiameter 3.2 mm at Radius of curvature 8 mm

General specifications

Display properties2.4-inch LCD, capacitive touch screen, readable outdoors, true color (65,536 colors)
Charger propertiesUSB-C medical grade wall adapter, AC 100 to 240V, 50/60 Hz
Battery 6 hours continuous use +/– 1 hour (10,000 mAh Li-ion);
3 hours charge time (5% - 75%);
5 hours charge time (0% - 100%);
IEC 62133-2:2017 certified
CalibrationFactory calibrated; no field calibration needed
Measurement capacityMeasurement storage capacity: > 10,000 measurements
Regulatory classification
(medical device)
Class I FDA (USA), Class IIa Product CE, MDR Compliant, Class IIa, UKCA, MDR 2002 Compliant
Laser safetyClass 1, IEC 60825-1:2014 certified
Weight< 750 grams / 1.65 lbs
Dimensions30 cm (H) x 5.5 cm (W), 18 cm (L)