Eyes are complicated organs full of nerves, muscles, soft tissues and blood vessels. They work together to provide sight, what many consider the most valued of the five senses. Because eyes are so complex, it is not always easy to determine the precise prescription necessary for 20/20 vision. With an autorefractor, this is possible.

What is an Autorefractor?

Huvitz Auto Ref/Keratometer HRK-9000A

An autorefractor is used to determine an individual’s prescription by measuring how light is affected as it reflects through the eyeball. The process is quick and painless for the patient, and the data ensures a baseline to determine the correct eyeglass or contact lens prescription.

How Does an Autorefractor Work?

First, the autorefractor shines light into the eye, measuring how it changes as it bounces off the back of the eye (the ocular fundus). Then, the patient is shown an image that moves in and out of focus. As reflections are made, several measurements determine when the eye is properly focused. These final figures determine the level of vision correction needed.

Wavefront technology showing the passage of light into an eyeball.

Unlike many conventional keratometer diagnostic devices, some autorefractors utilizes a unique wavefront technology algorithm based on Hartmann-Shack wavefront sensor, which analyzes many focal spots of a light wavefront. It has the ability to measure not just the basic refraction error of a customer, but to obtain a spatially resolved refraction map of the wavefront.

Types of Autorefractors/Keratometers

Coburn carries several autorefractors that are also built-in keratometers. This product duo determines eye prescription and measures the shape of the cornea. These capabilities are crucial for diagnosing eye conditions such as astigmatism or corneal distortion. They are also especially helpful for fitting contact lenses. Here is our autorefractor/keratometer lineup:

  • The Huvitz HRK-7000A Autorefractor is an advanced machine that features a Retro-Illumination Mode to help the ophthalmologist detect abnormalities with the lenses, scratches on corneas, or cataracts. HRK7000A can also determine precise sphere, cylinder, and axis measurements.
  • The Huvitz HRK-8000A Autorefractor is the first autorefractor that offers functionality to fit contact lenses. HRK-8000A allows the ophthalmologist to see the fluorescein liquid in blue illumination, as it analyzes the eye and simulates a lens fitting. It also features three-dimensional eye tracking and automatic recommendations.
  • The Huvitz HRK-9000A Autorefractor is a high-end machine offering cutting edge technology with enhance experience for the patient and ophthalmologist. HRK-9000A offers a Meibomian Gland Analysis function and Tear Film Break Up Time (TFBUT) measurement with wireless communication, full compatibility with all EMR systems and a full three year warranty.

Huvitz HRK-7000A          Huvitz HRK-8000A          Huvitz HRK-9000A Auto Ref/Keratometer

The autorefractor and keratometer duo is a staple for any eye care practitioner. Make your eye exams more efficient and accurate for an affordable price. Send us a message to get more information.