Auto refractors are a helpful tool when determining the level of refractive error in the eye. Gone are the days when optometrists relied solely on the patient’s input to determine the prescription needed. With an auto refractor, precise measurements are made based on light entering the eye.
What is an auto refractor?
Auto refractors measure how light is affected as it reflects through the eyeball, specifically a cone of infrared light. Quick and painless for the patient, they give an excellent baseline to determine the correct eyeglass or contact lens prescription. They provide an objective reading prior to the subjective tests that follow on a phoropter.
How does an auto refractor work?
An auto refractor works by shining light into the eye and measuring how it bounces off the back of the eye. The patient is shown an image that moves in and out of focus, taking several measurements of these reflections to determine when the eye is properly focused. When these figures are put together, it is clear what level of vision correction is needed for the patient to see at their best.
What are the most important features to consider when looking at an auto refractor?
The most important features to consider when choosing an auto refractor are based entirely on your preferences and needs. The following questions can help narrow down your options:
- Is it automated or manual?
- Does it perform keratometry?
- How accurate is the machine?
- How does the refractive data integrate with my current EMR system?
- What is the speed of the measurement and how well does it increase patient accommodation?
- Will this allow me a more comprehensive exam?
Use the following chart to accurately compare auto refractors/keratometers. Doubling as a keratometer, these machines will also measure the shape of the cornea.
Our latest offering of the auto refractor/keratometer is the Huvitz HRK-1 Auto Ref/Keratometer, built with unprecedented data accuracy, especially in higher diopter and cylinder measurement. HRK-1 features full compatibility with all EMR systems and includes a three year warranty. Contact us today to learn more!