An auto refractometer is a medical device used to measure the refractive error of the eye automatically. It helps optometrists and ophthalmologists determine a patient’s prescription for glasses or contact lenses.
How It Works
- The patient looks into the device at a specific target (often a small image or light).
- The machine projects infrared light into the eye, which reflects off the retina.
- Based on the reflection, the device calculates the eye’s refractive error, including myopia (nearsightedness), hyperopia (farsightedness), and astigmatism.
- The results provide an estimate of the patient’s prescription, which can be refined with manual refraction tests.
Advantages of Auto Refractometers
✅ Quick and easy – Takes only a few seconds per eye.
✅ Accurate estimates – Useful for both adults and children.
✅ Non-invasive – No discomfort for the patient.