[Soft contactlenses in general practice (author's transl)].
In contrast to the hard lenses the soft lens has enough permeability for oxygen and water-soluble substances, whereas high molecular substances, bacteria and virus cannot penetrate the soft lenses, so long as their surfaces are intact. The two principal production methods, the spin cast method and the lathe-turned method are compared. The duration of wearing of the soft lens depends on the deposits of proteins from the tears on the surface of the lens and the desinfection method. The daily boiling of the lenses shortens their useful life, while chemical desinfection causes besides bacteriolysis, damage of the corneal cell protein. The new cleaners on the base of proteolytic plant enzymes promise good results. For the optical correction of astigmatism with more than 1 cyl, soft lenses with conic outer surface are used or combinations of a soft and a hard lens (Duosystem). The therapeutic use of soft lenses has as aim: protection of the cornea against mechanical irritation, release of pain, protracted administration output of medicaments. Further indications for use: aseptic corneal inflammation and corneal defects.
D001251:Astigmatism / Q000628:therapy; D003263:Contact Lenses, Hydrophilic; D003316:Corneal Diseases / Q000628:therapy; D004203:Disinfection; D005136:Eye Proteins / Q000378:metabolism; D006801:Humans; D013666:Tears / Q000378:metabolism; D014785:Vision, Ocular
D005136:Eye Proteins
Weiche Kontaklinsen in der Praxis Materialien, Stoffwechsel, Oberflächen, Reinigung, therapeutische Anwendung