Kev faib tawm ntawm peb yam khoom tseem ceeb
Cov iav tsom iav
Thaum ub, cov khoom siv tseem ceeb rau cov iav tsom iav yog iav kho qhov muag. Qhov no yog vim tias cov iav tsom iav muaj lub teeb ci ntsa iab, pom tseeb zoo, thiab cov txheej txheem tsim khoom yooj yim thiab laus. Txawm li cas los xij, qhov teeb meem loj tshaj plaws nrog cov iav tsom iav yog lawv txoj kev nyab xeeb. Lawv tsis tshua muaj kev cuam tshuam thiab yooj yim tawg. Tsis tas li ntawd, lawv hnyav thiab tsis xis nyob hnav, yog li lawv daim ntawv thov kev lag luam tam sim no muaj tsawg.
Cov iav resin
Cov tsom iav resin yog cov tsom iav kho qhov muag uas ua los ntawm cov resin ua cov khoom siv raw, ua tiav thiab tsim los ntawm cov txheej txheem tshuaj lom neeg thiab kev txhuam kom zoo. Tam sim no, cov khoom siv dav tshaj plaws rau cov tsom iav yog cov resin. Cov tsom iav resin muaj qhov hnyav dua piv rau cov tsom iav iav kho qhov muag thiab muaj zog tiv taus kev cuam tshuam dua li cov tsom iav iav, ua rau lawv tsis tshua tawg thiab yog li muaj kev nyab xeeb dua rau kev siv. Hais txog tus nqi, cov tsom iav resin kuj pheej yig dua. Txawm li cas los xij, cov tsom iav resin muaj kev tiv thaiv khawb tsis zoo, oxidize sai, thiab yooj yim rau khawb ntawm qhov chaw.
Cov iav PC
Cov tsom iav PC yog cov tsom iav ua los ntawm polycarbonate (cov khoom siv thermoplastic) uas tsim los ntawm cua sov. Cov khoom siv no tau los ntawm kev tshawb fawb txog qhov chaw thiab tseem hu ua cov tsom iav qhov chaw lossis cov tsom iav cosmic. Vim tias PC resin yog cov khoom siv thermoplastic ua tau zoo, nws tsim nyog rau kev ua cov tsom iav qhov muag. Cov tsom iav PC muaj kev tiv thaiv kev cuam tshuam zoo heev, yuav luag tsis tawg, thiab muaj kev nyab xeeb heev rau kev siv. Hais txog qhov hnyav, lawv sib dua li cov tsom iav resin. Txawm li cas los xij, cov tsom iav PC tuaj yeem nyuaj rau ua, ua rau lawv kim heev.
Cov Khoom Siv Haum Rau Cov Neeg Laus
Rau cov neeg laus uas muaj teeb meem pom kev thaum laus (presbyopia), nws raug nquahu kom xaiv cov iav iav lossis cov iav yas. Feem ntau, kev kho mob thaum laus xav tau cov tsom iav nyeem ntawv uas siv hluav taws xob tsawg, yog li qhov hnyav ntawm cov iav tsis yog qhov txhawj xeeb tseem ceeb. Tsis tas li ntawd xwb, cov neeg laus feem ntau tsis tshua ua haujlwm ntau, ua rau cov iav iav lossis cov iav yas tawv heev tsis yooj yim khawb, thiab tseem ua kom pom kev zoo ntev.
Cov Khoom Siv Tsim Nyog Rau Cov Neeg Laus
Cov iav resin yog tsim rau cov neeg hnub nyoog nruab nrab thiab cov hluas. Cov iav resin muaj ntau yam kev xaiv, suav nrog kev sib txawv raws li qhov ntsuas refractive, kev ua haujlwm, thiab cov ntsiab lus tseem ceeb, yog li ua tau raws li ntau yam kev xav tau ntawm ntau pawg neeg sib txawv.
Cov Khoom Siv Tsim Nyog Rau Cov Menyuam Yaus thiab Cov Hluas
Thaum xaiv cov tsom iav rau menyuam yaus, cov niam txiv raug qhia kom xaiv cov iav ua los ntawm PC lossis Trivex. Piv rau lwm hom iav, cov khoom no tsis yog tsuas yog sib dua xwb tab sis kuj muaj kev tiv thaiv kev cuam tshuam zoo dua thiab muaj kev nyab xeeb dua. Tsis tas li ntawd, cov iav PC thiab Trivex tuaj yeem tiv thaiv qhov muag ntawm cov teeb meem UV.
Cov tsom iav no ruaj khov heev thiab tsis yooj yim tawg, yog li ntawd lawv thiaj li hu ua tsom iav kev nyab xeeb. Tsuas yog hnyav 2 grams ib cubic centimeter xwb, tam sim no lawv yog cov khoom siv sib dua tshaj plaws uas siv rau tsom iav. Nws tsis haum siv tsom iav iav rau cov menyuam yaus, vim tias cov menyuam yaus ua si thiab cov tsom iav iav yooj yim tawg, uas yuav ua rau lub qhov muag puas tsuaj.
Xaus Lus
Cov yam ntxwv ntawm cov khoom siv ntawm cov iav ua los ntawm cov khoom sib txawv yog qhov sib txawv heev. Cov iav iav yog qhov hnyav thiab muaj qhov tsis tshua muaj kev nyab xeeb, tab sis lawv tsis yooj yim khawb thiab siv tau ntev, ua rau lawv haum rau cov neeg laus uas tsis tshua muaj kev ua ub no thiab muaj qhov muag tsis pom kev zoo. Cov iav iav Resin muaj ntau yam thiab muaj ntau yam kev ua haujlwm, ua rau lawv haum rau ntau yam kev kawm thiab kev ua haujlwm ntawm cov neeg hnub nyoog nruab nrab thiab cov tub ntxhais hluas. Thaum nws los txog rau cov tsom iav menyuam yaus, kev nyab xeeb siab thiab lub teeb pom kev zoo yog qhov yuav tsum tau ua, ua rau cov iav PC yog qhov kev xaiv zoo dua.
Tsis muaj ib yam khoom zoo tshaj plaws, tsuas yog kev paub txog kev noj qab haus huv ntawm lub qhov muag xwb. Thaum xaiv cov iav tsom iav uas ua los ntawm ntau yam khoom sib txawv, peb yuav tsum xav txog los ntawm lub zeem muag ntawm tus neeg siv khoom, nco ntsoov peb lub hauv paus ntsiab lus ntawm kev siv iav tsom iav: kev xis nyob, kev ruaj khov, thiab kev ruaj khov.
Lub sijhawm tshaj tawm: Lub Ib Hlis-08-2024