1.56 Bifocal Flat top / Round Top / Blended HMC Optical lens

Kufotokozera Kwachidule:

Magalasi a Bifocals ndi magalasi owonera omwe amakhala ndi zowongolera zonse ndipo amagwiritsidwa ntchito makamaka pokonza presbyopia.Malo omwe ma bifocals amawongolera masomphenya akutali amatchedwa kutali vision area, ndipo malo omwe amawongolera pafupi ndi masomphenya amatchedwa pafupi ndi masomphenya ndi malo owerengera.Kawirikawiri, malo akutali ndi aakulu, choncho amatchedwanso kagawo kakang'ono, ndipo malo apafupi ndi ochepa, otchedwa sub slice.

Titumizireni imelo

Tsatanetsatane wa Zamalonda

Zolemba Zamalonda

Zambiri Zopanga

Malo Ochokera:	Jiangsu	Dzina la Brand:	BORIS
Nambala Yachitsanzo:	BifocalLens	Zida zamagalasi:	NK-55
Masomphenya:	Bifocal	Filimu Yophimba:	UC/HC/HMC
Mtundu wa Magalasi:	Choyera	Mtundu Wopaka:	Green/Blue
Mlozera:	1.56	Specific Gravity:	1.28
Chitsimikizo:	CE/ISO9001	Mtengo wa Abbe:	38
Diameter:	70 mm	Kupanga:	Lathyathyathya/Yozungulira/Yosakanikirana

Pali madigiri awiri okha pa lens ya bifocales, omwe amagawidwa kukhala kuwala kwapamwamba ndi kuwala kochepa.Kuwala kumtunda ndi kuwala kochepa kungakhale myopia, hyperopia, astigmatism, ndi zina zotero, koma kuwala kwapamwamba kumakhala kozama kuposa kuwala kwapamwamba kwa myopia ndi kuzama kwa kuyang'ana patali.

Kupita patsogolo kumapangidwa pamaziko a kuwala kawiri.Sizingokhala ndi makhalidwe a kuwala kawiri, kuphatikizapo kuwala kwapamwamba ndi kuwala kwapansi, komanso kumakhala ndi ndondomeko yapakatikati.Digiri pakati pa kuwala pamwamba ndi pansi kuwala ndi ndondomeko kusintha pang'onopang'ono.

Pamwamba, n'zoonekeratu kuona kusiyana pakati pa kuwala kawiri.Mzere wogawanitsa kapena mphambano pakati pa kuwala kwapamwamba ndi kuwala kwapansi kungawoneke, koma pamwamba pa lens yopita patsogolo sikungathe kuwona kusiyana kulikonse.

Ndi zone yosinthira, palibe vuto lodumpha njovu.Ndiko kuti, pang'onopang'ono kuchokera kutali kupita kufupi, kuchokera pafupi ndi kutali, ngati palibe malo osinthira, kuchokera pafupi ndi kutali, kuchokera kutali mpaka pafupi, palibe buffer overshoot.

Mau oyamba a Zopanga

Bifocal amatanthauza mphamvu ziwiri zosiyana za dioptric pa lens imodzi, mphamvu ziwiri za dioptricndi damaperekedwa m'madera osiyanasiyana a lens, malo omwe amagwiritsidwa ntchito kuti awone kutali amatchedwa mtunda wamtunda, womwe uli kumtunda kwa theka la lens;dera lomwe limagwiritsidwa ntchito kuwona pafupi limatchedwa dera lapafupi, lomwe lili m'munsi mwa theka la lens.

Ubwino wa ma bifocals: Mutha kuwona zinthu patali kudzera m'dera lakutali la magalasi, ndipo mutha kuwona zinthu zapatali kwambiri kudzera m'malo owoneka bwino a magalasi omwewo.Simukuyenera kunyamula magalasi awiri, ndipo simukuyenera kusinthana pakati pa mtunda ndi pafupi ndi magalasi pafupipafupi.

Kuipa kwa ma bifocals: Gawo loyang'ana ndi laling'ono kuposa la magalasi a masomphenya amodzi, makamaka pafupi ndi maso.Mwachitsanzo, kuwerenga mabuku ndi nyuzipepala kumafunika kugwirizana ndi kusuntha mutu.Pali zolakwika za kuwala za kulumpha ndi kusamuka kwa fano, ndipo pali mzere wogawanitsa, womwe ndi wosavuta kuwona kuvala.Onetsani zaka ndi bifocals.