M'zaka zaposachedwapa, dziko loyang'anira diso lakhala likukondwera ndi magalasi othandizira odwala scleral. Lensulo yothandizira makinawa ndi lalikulu zowononga mpweya (permeable ( RGP) zamagetsi zomwe sizikutsegula cornea komanso zimaphimba mbali yaikulu ya sclera, mbali yoyera ya diso. Zomwe zimakhala zowonongeka ndi galimoto zowonongeka bwino pafupifupi 9.0 mm mwake. Mapulogalamu a scleral amasiyana ndi 14 mpaka 20 mm.
Nthawi zina zimakhala zovuta chifukwa cha kutentha kwachilengedwe kwa cornea. Komabe, khungu la scleral likukhala pa sclera mmalo mwake, kotero kupotuka kwa mandala kumakhala ndi mbali yochepa momwe ikugwirizanirana.
Ubwino wa Zokongola Zogwiritsira Ntchito Lens
Zilonda zamakono zamakono zimakhala bwino kwambiri kuvala kusiyana ndi makina ang'onoang'ono a contact RGP. Kornea ili ndi masauzande ambirimbiri a mitsempha yomwe imapangitsa kuti ikhale yovuta kwambiri kwa chilengedwe. Chifukwa chakuti ndi ofunika kwambiri, anthu ambiri amatha kukhala ndi diso loyendayenda nthawi zonse pamene likuyendayenda pamaso. Lenti ya scleral imakhala makamaka pa conjunctiva ndi sclera. Chojambuliracho sichimvetsetsa kwambiri kusiyana ndi cornea, kutulutsa kuzindikira kwambiri komanso kusasangalatsa. Wodwala amene amapeza mpweya wolimba wa galimoto wotsekemera wotsekemera amatha kuvala lenti ya scleral mosavuta mosavuta.
Phindu linanso la kuvala khungu lamakono ndi luso la lens kuti liwonetsetse bwino masomphenya.
Chifukwa chojambulira khungu sichikhala pa cornea yokha, malo osungiramo madzi amadzimadzi amachokera pansi pa disolo. Gombe ili limateteza chitetezo cha cornea ndipo chimakhala ngati chingwe.
Komanso, maonekedwe a maso, monga keratoconus kapena pellucid marginal degeneration, amachititsa kuti cornea ikhale yosasinthasintha komanso nthawi zina kwambiri.
Nthawi zonse zimakhala zovuta kuti zikhale zosavuta kuziyika. Komabe, ndizosatheka kuti khungu la scleral liziyenda bwino chifukwa limadumphira kutali kwambiri ndi cornea.
Kodi Zipangidwe Zopangirako Zatsopano?
Chochititsa chidwi n'chakuti, malonda oyambirira omwe anayamba kumapeto kwa zaka za m'ma 1800 anali akalulu opangidwira. Njira zazikulu zowonongeka ndi zida zogwiritsira ntchito njira zowonetsera masomphenya kapena mavuto a maso anali zipangizo. Mapulogalamu oyambirirawa anali opangidwa ndi pulasitiki ndi galasi ndipo sanalole kuti mpweya uziyenda mozungulira kapena kuzungulira lens kupita ku cornea. Chifukwa chake, magalasiwo anali ochepa kwambiri ndipo anali okonzeka kukhala kokha pa cornea. Komabe, mapulogalamuwa nthawi zina amachititsa kuti odwala omwe ali ndi matenda a maso asokonezeke kwambiri. Zinalinso zovuta kupanga mapangidwe abwino omwe amayenera kukwaniritsa cornea ndendende. Zamakono zamakono zamakono zakhala zikusintha njira yopangira ndi kupanga.
Zimene Muyenera Kudziwa
Ngati mutasankha kuyesa makina opangira scleral, dokotala wanu wa diso adzafunika kuchita kafukufuku wa maso. Pakayezeso, mapu a makompyuta a maso anu adzakonzedwa ndipo zithunzi zowonjezereka zidzatengedwa m'maso mwanu.
Mudzafunikanso kuti mukhale ndi lens yolumikizidwa bwino. Pambuyo poyeza maselo a lens, kupanga malonda anu angayambe. Nthaŵi zina, inshuwalansi ya thanzi la maso ingaphimbe ndalama zamagalasi zogonana. Ngati muli oyenera ndi malonda awa chifukwa cha zofunikira zachipatala, funsani dokotala wanu maso kuti afunseni ngati inshuwalansi yanu imaphatikizapo zapadera zothandizana ndi lens zoyenera komanso zipangizo.
> Chitsime:
> Van der Worp, E. Chotsatira cha Lensera Zokwanira. Zojambula Zotsamba Maphunziro a Sukulu; 2010.