Kunyangwe iyo nhamba ye hydrogel yekuonana lenses yakakwira, yagara isingagutsi maererano neokisijeni permeability.Kubva ku hydrogel kusvika kusilicone hydrogel, zvinogona kutaurwa kuti kusvetuka kwemhando kwave kuwanikwa.Saka, seyakanyanya kuonana neziso panguva ino, chii chakanyanya kunaka nezve silicone hydrogel?
Silicone hydrogel ndeye hydrophilic organic polymer zvinhu zvine yakakwira oksijeni permeability.Kubva pamaonero ehutano hwemaziso, nyaya yakakosha iyo malenzi ekuonana anofanirwa kugadzirisa ndeye kuvandudza kugona kweokisijeni.Odinary hydrogel contact lens anovimba nemvura iri mulenzi semutakuri kuendesa okisijeni kucornea, asi kutakura kwemvura kudiki kwazvo uye kunoputika zviri nyore.Nekudaro, kuwedzera kwesilicon kunoita mutsauko mukuru.Silicone monomersIva nechimiro chakasununguka uye yakaderera intermolecular masimba, uye kunyungudika kweokisijeni mavari kwakakwira zvakanyanya, izvo zvinoita kuti iyo oxygen inopenyerwa yesilicone hydrogels iwedzere zvakapetwa kashanu kupfuura iyo yeakajairika lenzi.
Dambudziko rekuti oxygen permeability inofanirwa kuenderana nezviri mumvura ragadziriswa,uye zvimwe zvakanakira zvakaunzwa.
Kana huwandu hwemvura hwema lenses hunowedzera, sezvo nguva yekupfeka inowedzera, mvura inoputika uye inozadzwa nemisodzi, zvichiita kuti maziso maviri aoma.
Zvisinei, silicone hydrogel ine mvura yakakwana, uye mvura inoramba yakagadzikana kunyange mushure mekupfeka, saka hazvisi nyore kuburitsa kuoma, uye lenzi dzakapfava uye dzakasununguka apo dzichibvumira cornea kufema zvakasununguka.
Semagumo
contact lenses dzakagadzirwa nesilicone hydrogel dzinogara dzakanyorova uye dzinofema, kuvandudza kunyaradza uye kuderedza kukuvadzwa kwemaziso, zvakanakira izvo zvisingaenzaniswi neanogara achisangana lenzi.Kunyangwe silicone hydrogel inogona kungoshandiswa kugadzira mapfupi-kutenderera lenzi anoraswa uye haigone kushandiswa kune zvegore uye semi-pagore zvinoraswa, ichiri yakanakisa sarudzo yezvigadzirwa zvese.
Nguva yekutumira: Aug-16-2022
