NSL Analytical Services has been recognized as an Essential Business. We are fully operational and ready to service your testing needs.

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Ophthalmic Testing Services

Enhanced Simulated Wear Test (ESWT)

Consumers are hard on their glasses and they expect them to keep up with everyday life.  Do your lenses have problems with scratches, smudges and cleanability?  NSL Analytical’s Enhanced Simulated Wear Test (ESWT) answers the call.

NSL Analytical has developed a test with the wearing in mind.  ESWT uses scientific, quantifiable and repeatable procedures to evaluate lens coatings. The test simulates actual wear such as scratching and cleanability - the two primary consumer concerns - while including baseline measurements on adhesion, delamination, peeling and transmission.

Prove your lens coating stands out in the market place.  Click here for more information on NSL Analytical’s New Performance Evaluation Test.


The ESWT testing can be customized with ESWT+, a Statistical Analysis Package, to provide further understanding and benchmarking of the test results and can be very effective to understand the performance of lens coaters to assist in comparison of different locations.

For more information, please feel free to email us or complete an online information request.