Anthu amene amavala ma lens nthawi yaitali amadziwa momwe maso awo aliri okhudzidwa madzulo. Izi zimachitika, choyamba, chifukwa cha kuchepa kwa oxygen ku cornea. Mapuloteni a silicone-hydrogel amathetsa vutoli mosiyana-mosiyana ndi mapuloteni otentha a hydrogel, amalola maso kuti agwire nawo mpweya wabwino.
Mitundu yabwino kwambiri yopanga zitsulo za silicone-hydrogel
Madzi okhala ndi hydrogel ndi ma-lentirosi-a hydrogel amalumikizana ndi ofanana, koma mndandanda Dk / t ndi chiŵerengero cha mpweya wokhazikika kwa lens makulidwe pakati - chotsiriza chingakhale kangapo chapamwamba. Mwachitsanzo: PureVision lenses kuchokera ku Bausch & Lomb kuchokera ku silicone hydrogel ali ndi 110, ndi ma hydrogel lens omwe ali ndi American firm, koma kuchokera ku mndandanda wa SofLens 59 akhoza kudzitamandira coefficient of oxygen conductivity wa 16.5 okha. Zonsezi ndi zitsulo zina zimapangidwa kuti zikhazikitsidwe mwezi uliwonse.
Mapulogalamu apamwamba kwambiri ochokera ku silicone hydrogel amapezeka kwa opanga makina akuluakulu:
- Chithunzi;
- Alcon;
- Bausch & Lomb;
- Dziko;
- Zeiss.
Iwo ali ndi mzere wa masentimita a sililicone-hydrogel lens ndi ma lens omwe amavala kalekale. Chifukwa chapamwamba kwambiri Dk, zinakhala zotheka kupitiriza kuvala malisitomala kwa miyezi yambiri. Tsopano simungathe kuchotsa lenti usiku popanda kuwononga maso. Njira yothetsera mapuloteni a silicone-hydrogel sasiyana ndi kawirikawiri.
Mitundu ya sililicone-maselo a hydrogel
Chifukwa chakuti mawonekedwe opangira mawonekedwewa ali ndi pigment, mphamvu zawo zoyendetsera mpweya zimachepetsedwa kwambiri. Ngakhale powonjezera silicone ku hydrogel, vuto silikhoza kuthetsedwa - zilonda zamoto sizingatheke kwa maola 12 mzere. Komabe, zimakhala zosangalatsa kwambiri pamaso pathu. Mitundu yamakono yotchuka kwambiri ya sililicone hydrogel - Air Optix Mtundu wochokera ku America kampani Alcon.