Auto Refractor KR-800

What is it?

Topcon KR-800 Autorefractor takes stable and accurate refractive and keratometric measurements.

If you need vision correction, it is vital to determine how much your eyes need to be corrected for crisp and clear eyesight. Autorefractors automatically determine the amount of correction required to place the images formed in your eye at the top of your retina. The light-sensitive retina is responsible for processing the images correctly. The measurements taken by autorefractors are translated into a prescription for your eyeglasses or contact lenses.

Topcon KR-800 also measures the cornea, the clear, front part of your eye. Corneal mapping or topography can provide detailed 3-dimensional maps of the curvature and shape of the cornea.

How does it work?
  • 1

    An autorefractor first shines light into the eyes and then uses sensors to detect the reflected light. It measures how the light changes as it bounces off the back of the eye (fundus).

  • 2

    When you are shown an image, which moves in and out of focus, reflections are made. When the image is properly focused, several measurements then determine the levels of corrections needed.

What are its uses?

Topcon KR-800 is used to determine the amount of vision correction required in cases of:

  • Nearsightedness (myopia)
  • Farsightedness (hyperopia)
  • Blurred near and distant vision due to irregular eye curvature (astigmatism)

Keratometric measurements taken by Topcon KR-800 are useful in:

  • Astigmatism
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What to expect while undergoing the test with the machine?

You will be asked to be seated in a chair in front of the autorefractor. Your chin should be placed in a stabilizing chin rest. You will be asked to focus on an image or a point of light in the refractor.

Are there any side effects?
The test does not involve dilation of the pupil. There are no side effects of the test.

What are the advantages?

Topcon KR-800 Autorefractor allows unparalleled precision and reliability. It can measure a wider area of the retina, permitting measurements through small pupil diameter. Eye dilation is therefore not required. It can measure a wide range of refractive powers and corneal curvature.

How to prepare for the test?
Remove your contact lenses before the procedure. No other specific preparations are required.