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Trial Frame

A trial frame is a versatile optical device used in eye examinations to hold trial lenses in front of a patient's eyes while determining their refractive error.During an eye exam, the practitioner will insert different trial lenses into the frame, asking the patient to read from an eye chart. This process continues until the best visual acuity is achieved.

Key Features


  • Frame Structure: Typically made of lightweight plastic or metal, the frame is adjustable to fit various head sizes comfortably.
  • Lens Holders: These are the arms or clips where different trial lenses are inserted. They allow easy swapping of lenses during the refraction process.
  • Adjustable Nose Pads: These provide comfort and ensure that the frame sits properly on the patient’s nose.
  • Calibration Features:Some trial frames have markers or scales to help align the lenses accurately and maintain proper optical centers.


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