CR39 1.49 yopanda nsalu pamwamba pa bifocal ophthalmic lens

Kodi Bifocal Lens Ndi Chiyani Ndipo Amagwira Ntchito Motani?

Pali mitundu yosiyanasiyana yamagalasi yomwe ilipo masiku ano, ambiri a iwo akukwaniritsa cholinga chimodzi kapena zingapo.Mu blog ya mwezi uno tikambirana magalasi a bifocal, momwe amagwirira ntchito, komanso ubwino wake pazovuta zosiyanasiyana za maso.

Magalasi agalasi a Bifocal ali ndi mphamvu ziwiri zokuthandizani kuwona zinthu patali mukataya mwayi wosintha kuyang'ana kwa maso anu chifukwa cha ukalamba, womwe umadziwikanso kuti presbyopia.Chifukwa cha ntchito yeniyeniyi, ma lens a bifocal nthawi zambiri amaperekedwa kwa anthu opitirira zaka 40 kuti athandize kubwezera kuwonongeka kwa maso chifukwa cha ukalamba.

Mosasamala chifukwa chomwe mukufunikira mankhwala owongolera masomphenya apafupi, ma bifocals onse amagwira ntchito mofanana.Gawo laling'ono m'munsi mwa lens lili ndi mphamvu zofunikira kuti mukonze masomphenya anu apafupi.Ma lens ena nthawi zambiri amakhala owonera patali.Gawo la mandala lomwe limaperekedwa pakuwongolera masomphenya apafupi litha kukhala limodzi mwamawonekedwe angapo:

• Mwezi wa theka - umatchedwanso gawo lathyathyathya, lolunjika kapena la D
• Gawo lozungulira
• Malo opapatiza amakona anayi, omwe amadziwika kuti gawo la riboni
• Theka lonse la lens la bifocal lotchedwa Franklin, Executive kapena E style