Ka mor'a lilemo tse 40, basali ba atisa ho ba le nako e telele ea ho ba boemong bo phahameng ba ho ba teng kapa ho ba le boikarabello ba nako e telele. Lefu lena le khetholloa ke ho theoha ha lense ea leihlong, ka lebaka leo le lahleheloang ke matla a lona a ho fetola sebōpeho sa eona ka potlako le ho fana ka pono e hlakileng ka nako leha e le efe. Ha u sebelisa likhalase, u tlameha ho reka lipara tse 'maloa, mohlala, bakeng sa ho bala, mesebetsi ea letsatsi le letsatsi, sebetsa k'homphieutheng.
Li-lens tsa lisele tsa multifocal ke tsona tse ntle ho feta likhalase tsa ho lokisa mahlo. Li hlophisoa ka tsela eo lilense tse peli li u lumellang ho bona ka ho hlaka lintho tse fapaneng hōle. Ho itšetlehile ka litlhoko, ho na le mefuta e fapa-fapaneng ea likopano tse joalo.
Mokhoa oa ho khetha li-lenses tse ngata tsa ho kopana joang?
U ka reka lense tse loketseng bakeng sa ho lokisa presbyopia feela ka mor'a ho buisana le setsebi sa likokoana-hloko. Ha moketeng o amoheloa, ngaka e tla lekanya hore na ho na le libaka tse kae tsa optical moo ho lokelang ho ba le ho tsepamisa mohopolo linthong tse sa tšoaneng.
Khetho ea li-lenses tse kopanetsoeng tse ngata li etsoa har'a mefuta e latelang ea lisebelisoa:
- Bifocal. Lensense tse sa tšoaneng li na le libaka tse peli tsa optical, karolong e ka tlase - bakeng sa pono e hlakileng haufi, sebakeng se ka holimo - ho lebisa tlhokomelo linthong tse hōle.
- E ikhethang. Libakeng tse joalo, likarolo tse peli tsa optical li hlophisitsoe ho potoloha ho potoloha ho tloha bohareng ho ea ho pota-pota.
- Aspherical. Lenses tsena li nkoa e le tse tsoetseng pele le tse tsoelang pele. Bakeng sa pono e haufi, bohareng ba optical zone bo reretsoe. Ho tloha ho eona ho ea karolong e ka thōko ea mochine ona, matla a ho qhomela a fapana hanyane ka hanyane, e leng se nolofalletsang ho bona ka ho hlaka hōle le haufi, empa hape le maeto a bohareng.
Ho e-na le ho le thata ho khetha ho lokisoa mahlo ho bolela, kaha ba mefuta e sa tšoaneng - mekhoa e tloaelehileng ea setso, mekhoa ea letsatsi le le leng. Ho feta moo, boima ba thepa bo boetse boa bohlokoa, ka mohlala, ho na le silicone-hydrogel, e thata le e bonolo ea hydrophilic.
Lisebelisoa tse ntle ka ho fetisisa tsa ho kopanya li-multifocal
Lentili tse khothalletsoang tsa mofuta ona li tlameha ho ba le khase e lekaneng ho fana ka bolokolohi ba oksijene leihlong, hape e na le mongobo o phahameng oa ho thibela ho omella, ho halefa le ho nyatsa .
Lisebelisoa tse latelang tsa lisele tsa multifocal li finyella litlhoko tse thathamisitsoeng:
- CIBA Vision Alcon Air Optix Multifocal;
- Bousch + Lomb PureVision2 Bakeng sa Presbyopia;
- Sauflon Clariti Multifocal;
- Multi-Focal ea Bousch + Lomb Soflens;
- CooperVision Biofinity Multifocal;
- Bousch + Lomb PureVision Multi-Focal;
- Mark'ennovy Xtensa Multifocal;
- CooperVision UV e Multifocal.
Mabitso a boletsoeng ka holimo a reretsoe ho apara nako e telele ka mocha o nchafalitsoeng. Boholo ba tsona bo entsoe ka boitsebiso bo bonolo ba hydrophilic, ba na le bokhoni bo phahameng ba ho boloka mongobo le filimi e sireletsang mahlong, e-ba le ho feta ha oksijene e feta.
Haeba o hloka ho nka lisebelisuoa tsa letsatsi le le leng, o lokela ho ela hloko lensishene tse ngata tsa ho kopanya Clariti 1 Letsatsi la Multifocal ho tloha Sauflon le Proclear 1 Letsatsi la Multifocal ho tloha CooperVision. Hape tse ntle ke Alcon Dailies AquaComfort Plus Multifocal, e hlahisoang ke CIBA Vision.
Selekaneng se seng le se seng se na le lilense tse 30 tsa lense tse reretsoeng letsatsi le letsatsi. Molemo oa mofuta ona oa ho khalemeloa ke pono ke bohloeki ba bona. Ho phaella moo, lihlahisoa tsena tsa lisebelisoa tsa multifocal li na le metsi a mangata a holimo, a sireletsang leihlo hore le se ke la omella.