How autorefractors / keratometers work
The machine works simply by using light to test the eye. From the patient’s point of view, a small and bright light is shone into the eye. The ophthalmologist can then use the machine to measure precisely how the light bounces around from the front to the back of the eye. Using knowledge of the ocular fundus, the ophthalmologist can determine whether or not the eye has any abnormalities. It can assist in determining if the patient needs help focusing, or if special lenses are required. The process also involves showing the patient an image that will slowly focus and then blur, making it so that the ophthalmologist can determine if the eye is focusing properly. The doctor will take the results of each focus and put them together to determine whether or not the patient’s vision is correct.
About autorefractors / keratometers
Autorefractors/keratometers are built to help the ophthalmologist determine whether or not the eye patient has proper vision. It tests the eye’s ability to focus by shining light on all parts of the eye, including the eyeball and the back of the eye. That way, the ophthalmologist can measure how the eye reacts to the light, and how it focuses on blurry and sharpened images. This procedure is effortless and painless for the patient and helps them determine if they need contact lenses or not.
Autorefractors / Keratometer Manufacturers
- Welch Allyn
- AIT Industries
- Briot USA, Inc.
- Tracey Technologies Corporation
- CAL Coast Ophthalmic Instruments
- Topcon Medical Systems, Inc.
- Norwood Device & Diagnostics
- Foresight International
- And many more