MEDICO Autorefectometer

Medico Instruments Delhi An autorefractometer is an ophthalmic instrument used to measure a person's refractive error. It provides an objective assessment of how light is bent (refracted) as it enters the eye, helping to determine whether the person is nearsighted (myopic), farsighted (hyperopic), or has astigmatism.

Key Features and Functionality:

1. Automated Measurement: The device is designed to quickly and accurately measure the refractive power of the eye with minimal input from the patient.

2. Process: The autorefractometer projects light into the eye, and the light reflects off the retina and returns to the device. The machine then analyzes this reflection to determine how the eye is focusing the light.

3. Output: The device provides a prescription for corrective lenses in terms of sphere (overall lens strength), cylinder (astigmatism correction), and axis (orientation of astigmatism correction).

4. Accuracy: While highly accurate, an autorefractometer's reading often requires fine-tuning by an optometrist or ophthalmologist, as the subjective preferences of the patient are important for precise lens prescriptions.

5. Ease of Use: The test is quick and non-invasive, often used as a preliminary tool before a more comprehensive eye exam. 

Autorefractometers are used in optometry practices, hospitals, and optical shops, and are essential for quick vision assessments.