Chidziwitso choyambirira cha magalasi owerengera omwe muyenera kudziwa

Magalasi owerengera ndi mtundu wa magalasi a kuwala, omwe amapereka magalasi a myopia omwe amagwiritsidwa ntchito ndi anthu omwe ali ndi presbyopia, omwe ali a lens convex. Magalasi owerengera amagwiritsidwa ntchito kudzaza maso a anthu azaka zapakati ndi okalamba. Monga magalasi a myopia, ali ndi zinthu zambiri zamagetsi zamagetsi zomwe zimafunikira ndi miyezo yamakampani adziko lonse, komanso amakhala ndi machitidwe apadera ogwiritsira ntchito. Choncho, magalasi owerengera ayenera kukhala ndi magalasi.

Choyamba, gulu lofunika kuwerenga magalasi

Pakali pano, pali mitundu itatu yofunika kwambiri ya magalasi owerengera pamsika, omwe ndi magalasi amodzi, ma lens a bifocal ndi ma asymptotic multifocal lens.

Masomphenya amtundu umodzi amatha kugwiritsidwa ntchito kuti muwone pafupi, ndipo masomphenya ayenera kubwezeretsedwanso mukayang'ana patali. Ndizoyenera kwa anthu omwe ali ndi presbyopia yosavuta komanso otsika pafupipafupi ogwiritsira ntchito magalasi owerengera;

Bifocals amatanthawuza magalasi owerengera okhala ndi magalasi apamwamba omwe amagwiritsidwa ntchito kuwonera patali, ndi magalasi owonera apakati omwe amawonera pafupi, koma magalasi owerengera otere amakhala ndi maso osawona komanso amadumpha, ndipo kuvala kwanthawi yayitali kumakhala kovutirapo kwambiri ndi ululu wamaso, chizungulire. , etc. , mapangidwe apanyumba sawoneka bwino, ndipo sizodziwika tsopano; mandala asymptotic multifocal amatha kukwaniritsa zofunikira za kusawona bwino pamtunda wosiyanasiyana patali, pakati ndi pafupi. Maonekedwe ndi apamwamba kwambiri komanso apamwamba, ndipo ndi oyenera kwambiri kwa myopia yamakono yoposa zaka 40. Diso kuphatikiza presbyopia, astigmatism gulu kuvala.

Chachiwiri, ntchito zochitika kuwerenga magalasi

Presbyopia ndi yachibadwa zokhudza thupi chodabwitsa, osati matenda a maso, komanso si munthu wokalamba yekha. Pambuyo pa zaka 40, ndi kuumitsa kwapang'onopang'ono kwa ulusi wa mankhwala a lens ya diso ndi kufooka kwapang'onopang'ono kwa thupi la ciliary, diso la munthu silingathe kusintha maonekedwe a maonekedwe (radial transformation). Malingana ndi mtunda pakati pa zinthuzo, muyenera kusunthira kutali mukamayang'ana zinthu zomwe zili pafupi kwambiri musanawone bwino. Mkhalidwe wa maso onse panthawiyi umatchedwa presbyopia.

Ngati presbyopia akufuna kugwiritsa ntchito diso masomphenya pa choyambirira chizolowezi mtunda, m`pofunika kuvala kuwerenga magalasi kudzaza diso masomphenya, kuti pafupi masomphenya akhoza kuoneka bwino kachiwiri. Maso awiri. Mlingo wa myopia mu presbyopia umagwirizana ndi zaka. Ndi kukula kwa msinkhu, kuwonongeka kwa lens kwa maso kudzawonjezeka, ndipo mlingo wa myopia udzawonjezeka pang'onopang'ono.

Presbyopia yachitika kale, ndipo ngati mumaumirira kuti musavale magalasi owerengera, thupi la ciliary lidzatopa ndipo silingathe kusintha, zomwe zidzawonjezera kuvutika kwa kuwerenga, chifukwa cha chizungulire, chizungulire ndi matenda ena ambiri, omwe adzaika moyo watsiku ndi tsiku pangozi. ntchito. Kudzidalira kwambiri. Choncho, magalasi a presbyopia ayenera kufananizidwa mwamsanga popanda kuchedwa (anthu a ku China ali ndi malingaliro olakwika: amaganiza kuti kuvala magalasi owerengera ndi "matenda" aakulu, ndipo sazindikira kukhalapo kwa magalasi owerengera. Ili ndi lingaliro lolakwika) .

Akakalamba, magalasi owerengera omwe anali ndi myopia osakwanira ayenera kusinthidwa nthawi yomweyo. Choncho, magalasi owerengera sayenera kuvala nthawi zonse. Kuvala kwa nthawi yayitali magalasi owerengera ndi digiri yosayenera ya myopia sikudzangoyambitsa mavuto ambiri pa moyo wa tsiku ndi tsiku, komanso kupitiriza kufulumizitsa ndondomeko ya binocular presbyopia.

Nthawi zambiri, pali ziwonetsero zazikulu ziwiri za presbyopia koyambirira:

Choyamba ndi ntchito yapafupi kapena kuwerenga kovuta. Mwachitsanzo, powerenga, muyenera kuligwira bukulo chapatali, kapena muyenera kuliwerenga m’dera lomwe lili ndi kuwala kwamphamvu kuti muzindikire.

Chachiwiri ndi kutopa kwa maso. Ndi kuchepetsa mphamvu ya malawi, zofunika kuwerenga pang'onopang'ono kuyandikira malire a malawi mphamvu, ndiko kuti, powerenga, makamaka mphamvu zonse malawi a maso onse ayenera kugwiritsidwa ntchito, kotero kuti n'zosatheka kugwiritsa ntchito maso kwa nthawi yaitali, ndi n'zosavuta kuyambitsa kutupa kwa maso chifukwa cha kusintha kwakukulu. , kupweteka kwa mutu ndi zizindikiro zina zowoneka kutopa.

Kupezeka kwa zinthu ziwiri zomwe zili pamwambazi kumasonyeza kuti maso amatha kukalamba pang'onopang'ono. Kwa magulu a myopic, m'pofunika kuvula magalasi a myopic kapena kusintha buku lowerengera kutali pamene mukuwerenga pafupi, chomwe ndi chiwonetsero chachikulu cha presbyopia. Pambuyo pa maso onse awiri ndi presbyopic, njira yotetezeka kwambiri ndikuvala magalasi owerengera oyenera kuti muyese.