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The Optical Knowledge Portal
Information – Education – Certification

Contact lenses

Contact lenses

Contact lenses are small plastic lenses placed directly on the surface of the eye to help correct refractive errors, that is to say the loss of focus. They float on the tear film layer that coats the surface of the eye.

Click on the individual sections to gain an overview and find out more about the different types of contact lenses and how to care for them.