History of Contact Lenses

Contact lenses may be grouped into two main types; hard gas permeable contact lenses, and soft hydrogel contact lenses.
Leonardo da Vinci is frequently credited with introducing the general principle of hard contact lens. He described a method of directly altering corneal power by submerging the eye in a bowl of water. Leonardo, however, did not suggest his idea be used for correcting vision as he was primarily concerned with learning about the mechanisms of accommodation of the eye.

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