Auto-Refractors

An auto-refractor measures the near-final prescription for glasses for the best distance vision. This near-final prescription is then delivered directly into an auto-phoropter via a computer cable. The final results require the doctor’s subjective interpretation.

Several features of an auto-refractor are:

  • Spherical power range is available in plus and minus.
  • Cylinder power can be expressed in plus or minus cylinder.
  • Axis reading is available from 1 degree to 180 degrees.
  • Accurate inter-pupillary distances are given in the readout. This is very beneficial in fitting monocularly sighted patients, patients with special needs, and infants, and can be incorporated into the prescription for glasses.
  • Vertex distance is automatically measured in some of the units and also may be incorporated into the final prescription.
  • Pupil size can also be measured and is useful in fitting rigid lenses and refractive surgery candidates.

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COVID-19 Update

Neovision Eye Center will be closed for eye examination appointments until May 4th, 2020.

Our staff will be checking phone messages periodically and is available to assist you, as needed. 

Please direct non-urgent phone calls to 510-431-5511. Be sure to leave your email address in your message, and we will get back to you as soon as possible.

Union City