Service
कंप्यूटर (Autorefractor) द्वारा नेत्र परिक्षण (चश्मा आपूर्ति)
An autorefractor is a modern device used in optometry and ophthalmology for determining the refractive error of the eyes. It provides accurate measurements that assist in prescribing eyeglasses or contact lenses. The process of using a computerized autorefractor for eye examination is quick, efficient, and highly reliable, making it a common practice in eye care clinics.Eye examinations using an autorefractor are an essential part of modern optometry. This advanced technology provides quick and accurate results, ensuring that patients receive the right prescription for eyeglasses or contact lenses. While the autorefractor offers a preliminary measurement, a comprehensive eye exam by an optometrist is crucial to ensure overall eye health and accurate prescriptions.
What is an Autorefractor?
An autorefractor is a computer-controlled machine that measures how light changes as it enters the eye and focuses on the retina. It evaluates the eye’s refractive error, which determines whether a person has:
- Myopia (Nearsightedness)
- Hyperopia (Farsightedness)
- Astigmatism
This device provides an initial prescription that helps optometrists and ophthalmologists finalize the corrective lenses needed for clear vision.
How the Autorefractor Works
Light Projection:
The autorefractor projects a beam of light into the eye, which travels through the cornea and lens to the retina.Light Reflection Measurement:
The device measures how the light is reflected back from the retina. By analyzing these reflections, it calculates the refractive error of the eye.Automatic Calculations:
The autorefractor uses advanced algorithms to provide precise measurements for each eye, including sphere, cylinder, and axis values needed for eyeglass prescriptions.
Procedure of Eye Examination with an Autorefractor
Positioning:
- The patient sits comfortably and places their chin on the chin rest of the autorefractor.
- The patient is asked to focus on a specific target inside the machine, usually an image or light.
Measurement Process:
- The device automatically takes measurements of each eye.
- The process is quick and typically takes less than a minute per eye.
Result Analysis:
- The autorefractor provides a detailed printout of the refractive measurements.
- The optometrist or ophthalmologist uses these results as a baseline to refine the final prescription during a subjective refraction test.