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Hard contact lenses

The first hard contact lenses were made of glass. In 1936 there was the discovery of PMMA – polymethylmet­hacrylate, which replaced the glass. It is a…


The real revolution in the development of contact lenses come in 1953, when Czech scientists, Otto Wichterle and Lim Jaroslav represent the first soft hydrophilic contact lens material called…

HPMC (Hydroxypropyl methylcelulosa)

HPMC (Hydroxypropyl methylcelulosa) is a moisturising component included in the contact lens blister solution in which contact lenses are stored. This means it starts working straight after you…

Hyaluronic acid (sodium hyaluronate)

Hyaluronic acid is a natural part of the human body. It has amazing water binding qualities, ideal for dry eye syndrome treatment. Combining eye drops with hyaluronic acid is one of the most…


This is the material the soft contact lenses are made of.


Hyperopia is an optical defect of vision (refractive error) when the eyeball is too short or refraction optical system of the eye is too weak…

Hypoxia and hypercapnia

Under natural circumstances, the cornea accepts oxygen from the environment and excretes its metabolic product, carbon dioxide, into the environment. An applied contact lens represents a…

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