Accommodation research

The purpose of Power Refractor is to meter accommodation in real time

PowerRef 3 provides binocular, dynamic measurements of accommodation in sphere, convergence and pupil diameter changes in scotopic, mesopic and photopic conditions. It is an unique accommodation meter that is being used by scientists.

Basic features

  • binocular, dynamic measurements
  • 50 measurements per second
  • Contactless measurement
  • Configurable result screen
  • Integrable to own applications
  • Modular structured system components

Click here to download PowerRef 3 specifications.


  • Measurement of the correlation of vergence and accommodation
  • Determination of peripheral refraction
  • Determination of the correlation of pupil diameter and accommodation
  • Measurement of accommodation response time
  • Measurement of scope of accommodation
PowerRefractor - Alignment options
Click here to download an overview of the alignment options.

Other than Plusoptix vision screening devices and Plusoptix binocular autorefractors this instrument is not designed for children age 6 months and older. Test person’s head need to be fixed in a chin rest. PowerRef 3 can be located outside of the line of sight by using a hot mirror. This way visual tasks can be offered to a test person in the open field.

In order to ease a custom, research specific set-up, Plusoptix offers optional auxiliaries (chin rest, hot mirror apparatus, sliding rail with camera adapter, etc.).

Plusoptix offers complimentary training at its Nuremberg/Germany headquarters (airport code NUE). Scientists are welcome to schedule training at their convenience prior to or after taking their purchasing decision.

With the PowerRef II (Preliminary model), more than 200 scientific studies have been conducted. Click here, to have a look at those studies.

Click here to download PowerRef 3 specifications.

Do you want to know more? For quotations or more information about this device, click here to get in touch with us.

Plusoptix - Device Generations
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