Ruwan tabarau na gani na PGX HMC mai faɗi 1.56 SF

Menene Ruwan tabarau na Bifocal kuma Ta Yaya Suke Aiki?

Akwai nau'ikan ruwan tabarau iri-iri da yawa da ake da su a yau, da yawa daga cikinsu suna cika manufa ɗaya ko ma manufofi da yawa. A cikin rubutun wannan watan za mu tattauna ruwan tabarau na bifocal, yadda suke aiki, da kuma fa'idodin su ga matsalolin gani daban-daban.

Gilashin ido na Bifocal suna ɗauke da ƙarfin ruwan tabarau guda biyu don taimaka maka ganin abubuwa a kowane nesa bayan ka rasa ikon canza yanayin idanunka ta halitta saboda tsufa, wanda kuma aka sani da presbyopia. Saboda wannan takamaiman aikin, an fi ba wa mutanen da suka haura shekaru 40 ruwan tabarau na bifocal don taimakawa wajen rama lalacewar gani ta halitta saboda tsufa.

Ko da menene dalilin da yasa kake buƙatar takardar magani don gyaran hangen nesa kusa, bifocals duk suna aiki iri ɗaya. Ƙaramin yanki a ƙasan ruwan tabarau yana ɗauke da ƙarfin da ake buƙata don gyara hangen nesa kusa. Sauran ruwan tabarau yawanci yana don hangen nesa na nesa. Sashen ruwan tabarau da aka keɓe don gyaran hangen nesa kusa na iya zama ɗaya daga cikin siffofi da yawa:

• Rabin wata — wanda kuma ake kira da lebur-top, madaidaiciya-top ko D segment
• Sashe mai zagaye
• Yanki mai siffar murabba'i mai faɗi, wanda aka sani da sashin ribbon
• Cikakken rabin ƙasan ruwan tabarau mai siffar bifocal da ake kira Franklin, Executive ko E style