A lens contact is a lightweight corrective, cosmetic or therapeutic device which is often placed directly into the cornea of the eye. Kubatanidza lensiti kune zvakawanda zvinobatsira kune vateereri, kusanganisira maitiro uye maitiro. Vanhu vazhinji vanosarudza kupfeka majekiti ekupikisa kusiyana nemagirazi emaziso sezvavasingaendi , vanopa nzvimbo yakawanda yekuona, uye ivo vakanyatsokodzera mitambo yakawanda yemitambo.
Kubata lenzi kunopesana maererano nekugadzirwa kwezvinhu, kupfeka nguva, kushandura purogiramu, nekugadzira. MuUnited States, mabhizinesi ekutengesa anotorwa semichina yezvokurapa uye anoda chiremba nemunhu anokwanisa kutarisira maziso.
Kutanga Kukurukura Lens Designs
Kunyange zvazvo tichifunga nezvekubatanidza lensisheni semagetsi ezuva ranhasi, pfungwa yacho yekutanga yakagadzirwa naLeonardo da Vinci. Makore mazana mashanu akapfuura, akatora mifananidzo kuratidza kuti simba rekubvisa kweziso rinogona kuchinja sei nekusangana nemvura. Makore gare gare, vavaki vakafunga nezvokuisa girazi paziso kuti vachinje nzira iyo ziso redu rinotarisa. Maonero avo angangodaro akave akawedzerwa kubudirira kudai vaive nezvinhu uye nzira dzekugadzirisa nadzo dzavaiva nadzo nhasi. Anenge makore makumi maviri akapfuura masayendisiti muGermany akaita yekutanga lens inobva kunze kwegirazi. Vaizonzi scleral lens nokuti havana kungogara pa-cornea, iyo yakajeka dome-yakafanana nechepamusoro pechiso chekutanga cheziso, asi pane iyo yose yakachena nyemba (sclera) yeziso.
Rigid Lenses
Munenge muna 1940, yekutanga plastiki lens yakagadzirirwa iyo yakagara pamakorome chete. Iyi plastiki yakagadzirwa kubva kune PMMA (polymethyl methacrylate.) Nemhaka yokuti lenzi yaiva duku zvikuru, yakaratidzika kuva yakanyatsonaka. Iri lens harina kubvumira okisijeni kuti ipfuurire zvakare uye mumakore ekuma1940 gasi yakazara permeable's yakagadzirirwa kugadzirisa dambudziko iri.
Izvi zvakaratidza kugadzirwa kwe PMMA lens asi yakange iine hutano hwakanaka sezvo yakabvumira kupararira kwemaziso nekufema kweokisijeni.
Soft Contact Lenses
Uyewo mumakore ekuma1970, vashanduri vakanga vachiedza zvinhu zveplastiki zvakatumidzwa zvinonzi HEMA (hydroxyethyl methacrylate.) Nyaya iyi yakanyorovesa mvura uye yakashandura kuitira kuti inogona kuvhara pamusoro pecnea. Nemhaka yokuti plastiki yakaenzaniswa nemafungiro eziso uye yakanga iri nyore, HEMA lens yakapa pakarepo kunyaradzwa. Aya majekisi ainyanya kugadzirirwa kuti mapepa maviri apedze gore. Somugumisiro, sangano rekushona lens rakafambira mberi nepamusoro wekukurumidza.
Kutadza Kukurukurirana Lenses
Mukupera kwema1980 nekutanga kwema1990, lenzi dzakaderera dzakagadzika dzakauya pamusika zvichiita kuti zvigone kuwanika uye zviri nyore kuti vanhu vafukidze nhengo dzemagetsi. Aya majekisi akagadzirirwa kupfeka kwemasvondo maviri, mwedzi umwe, kana kwekamu imwe zvichienderana nerudzi rwe lens design. Nenguva isipi mushure mezvo, lenzi dzemazuva ose dzakasunungurwa dzakabudiswa. Zuva rejeri rinogadziriswa rinopfekedzwa kwezuva rimwe chete ndokubva radzingwa.
Silicone Lenses
Mumakore achangobva kupfuura, chinangwa chakatendeukira kune silicone based plastiki iyo inobvumira zvakawanda zve okisijeni kupinda mumapurasitiki kusvika ku cornea. Uyezve, vakugadziri vari kuramba vachishanda zvakaoma mukusika ipurasitiki iyo yakanga iri "yakanyorovesa" uye haina kuoma kunze kwemaawa ekupfeka.
Scleral Lenses
Zvinofadza kuti scleral lens iri kuve yakakurumbira. Nokuti nhasi nzira dzokugadzira dzinobatsirwa nekombiyuta kugadzirwa, scleral lens inogona kugadzirwa kuitira kuti iwedzere kusununguka. Majekiseni emagetsi anoshandiswa kunyanya kune vanhu vane maziso akaoma, mazamu akawanda eastigmatism, uye vanhu vane corneal deformity uye kupera.
Uyewo Anozivikanwa se: Vhesi