Dab tsi lo ntsiab muag haum rau cov menyuam yaus thiab cov tub ntxhais hluas?

Raws li myopia nce cuam tshuam rau cov neeg hluas, ntau yam kev xaiv lens rau cov menyuam yaus tau nthuav dav, ua rau ntau tus niam txiv ntxhov siab. Txij li thaum menyuam yaus qhov kev xav tau tsom iav yog qhov nyuaj dua li cov neeg laus, uasLenspuas zoo dua rau kev tsim cov menyuam yaus thiab cov tub ntxhais hluas? Yam tseem ceeb dab tsi cov niam txiv yuav tsum xyuam xim rau thaum xaiv lo ntsiab muag rau lawv cov menyuam? Nov yog cov lus piav qhia luv luv ntawm cov khoom sib txawv uas feem ntau siv hauv lo ntsiab muag.

iav Lenses
Feem ntau ua los ntawm cov iav kho qhov muag, cov khoom siv no tau siv keeb kwm hauv lub koob yees duab lo ntsiab muag.
Qhov zoo: Nqis peev, siab tawv tawv, khawb-resistant, zoo heev lub teeb xa mus, ruaj khov khoom, thiab siab refractive index.
Tsis txaus: Heavyweight thiab yooj yim fragile, compromising kev nplij siab. Cov iav lo ntsiab muag tsis tshua siv niaj hnub no.

ResinLens
Ua los ntawm phenolic resin los ntawm chemical synthesis thiab polishing.
Qhov zoo: Lub teeb yuag (qhov ntom: 0.83–1.5 g / cm³ vs. optical iav 2.27–5.95), shatter-resistant, tshav kub-resistant, siab transmittance, thiab adaptable rau tshwj xeeb designs (xws li, aspheric lo ntsiab muag). Cov txiaj ntsig zoo no ua rau cov lo ntsiab muag resin xaiv qhov tseem ceeb.
Tsis txaus: Siab thermal expansion coefficient, nquag deformation, cuam tshuam rau kev ua haujlwm kho qhov muag.

Polycarbonate (PC) Lenses
PC lo ntsiab muag tseem hu ua "qhov chaw lo ntsiab muag" lossis "cosmic lo ntsiab muag". Ua los ntawm thermoplastic polycarbonate - cov khoom siv lub teeb pom kev zoo tshaj plaws muaj.
Qhov zoo: High refractive index, 100% UV tiv thaiv, yellowing-resistant rau 3-5 xyoo. Thaum ua tau zoo, PC lo ntsiab muag yog 37% sib dua thiab 12 × ntau qhov cuam tshuam-resistant dua li cov qauv lo ntsiab muag.
Shortages: kim kim.

Nylon Lenses
Crafted los ntawm pob tshab polyamide (ib tug tshiab polyamide variant), feem ntau siv nyob rau hauv sportswear thiab khoom kim heev looj tsom iav dub.
Qhov zoo: siab elasticity, cuam tshuam tsis kam, thiab superior kho qhov muag zoo.
Kev tsis txaus: kim thiab tsis zoo rau kev puas tsuaj.

Cov ntsiab lus tseem ceeb rau menyuam yaus
Cov lo ntsiab muag zoo yog qhov tseem ceeb rau kev txhim kho qhov muag pom, vim tias cov menyuam yaus lub tshuab tsis pom kev tseem tab tom loj hlob. Tsis txhob siv lo ntsiab muag uas tsis zoo tsuas yog txhawm rau txuag nqi, txawm tias cov menyuam yaus ua haujlwm.

• Hloov lub voj voog: Cov tshuaj me nyuam hloov sai heev. Ophthalmologists pom zoo biannual/annual qhov muag kuaj (tsis pom kev, refraction, intraocular siab, fundus check). Cov iav yuav tsum tau hloov yog tias daim ntawv tshuaj hloov pauv los ntawm ≥50 degrees lossis yog tias cov iav / lens tsis haum (piv txwv li, qhov deb ntawm cov menyuam yaus) tsis haum. Yog li ntawd, kim lo ntsiab muag yog tsis tsim nyog.

• Pom zoo xaiv: Muab cov menyuam yaus txoj kev ua neej nyob, xaiv cov lo ntsiab muag pheej yig los yog cov lo ntsiab muag PC me me. Ob leeg muaj lub teeb yuag durability thiab shatter tsis kam tiv thaiv qhov muag raug mob.

Rau Cov Hluas
Cov tub ntxhais hluas cov tsom iav ua rau siv hnyav, yog li ua qhov tseem ceeb ntawm khawb tsis kam, siab refractive Performance index, thiab cov khoom siv hnyav (resin lossis PC lo ntsiab muag zoo tagnrho).

• Kev xaiv tshwj xeeb: Xav txog cov lo ntsiab muag los tiv thaiv kev qaug zog (nrog + 0.50D rau +1.00D ntxiv rau hauv thaj chaw ze-qhov muag) lossis cov tsom iav tsom iav (peripheral defocus tsim) kom txo qhov muag pom thiab qeeb axial elongation / kev loj hlob. Tham nrog cov kws tshaj lij rau kev taw qhia.

Cov lus qhia ntxiv

• Tshawb xyuas cov chaw tsim khoom cov khoom muag muag cov ntawv tso cai tsim khoom.

• Xyuas kom meej tias cov cuab yeej kho qhov muag thiab cov cuab yeej ntsuas ntsuas muaj cov ntawv pov thawj siv tau.

• Paub meej tias optometrists thiab cov kws kho mob tuav cov ntawv pov thawj siv tau.