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Lensometers

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Lensometers have evolved into computerized instruments we use to determine the power of a lens.  They are very handy to have around because we can determine the Rx of your old glasses, even if you don’t have your old records.  We also use our lensometers to double check your new glasses when they come in to make sure they meet our stringent criteria.  

 
The way a lensometer works is that it shines a pattern through the lens.  Each Rx will distort that pattern in its own particular way.  The computer inside then matches the resulting distortion to the correct Rx and provides a written copy of what your glasses are.