Comprehensive eye testing goes a long way in correcting your vision and helping you see things clearly. Gone are the days that everything needs to be done manually. With the advent of computerized eye testing, it has become easy and cost-effective to test for errors in sight and prescribe corrective lenses.
The device that performs this test is called an auto-refractometer. There are multiple variations of this in the market, but the working principle behind it remains the same. Light is thrown on to the eyes and the reflections are measured.