Halin presbyopia zai bayyana a hankali bayan shekaru 40, amma a cikin 'yan shekarun nan, saboda rashin halayen ido na mutanen zamani, mutane da yawa sun ba da rahoton presbyopia a gaba.Saboda haka, da bukatarbifocalskumamasu ci gabakuma ya karu.Wanne daga cikin wadannan ruwan tabarau guda biyu ya fi so ga mutanen da ke da myopia da presbyopia?
1. Bifocals
Bifocals suna da digiri biyu.Gabaɗaya, ana amfani da ɓangaren sama don ganin wurare masu nisa, kamar tuƙi da tafiya;Ana amfani da ƙananan ɓangaren don ganin kusa, kamar karatun littafi, wasa da wayar hannu, da dai sauransu. Lokacin da ruwan tabarau na bifocal ya fara fitowa, hakika an dauke su a matsayin bishara ga mutanen da ba su da hangen nesa da presbyopia, suna kawar da matsalolin cirewa da kuma sawa akai-akai, amma kamar yadda mutane ke amfani da su, sun gano cewa ruwan tabarau na bifocal shima yana da illoli da yawa.
Da farko dai babban illar irin wannan nau'in ruwan tabarau shi ne kasancewar digiri biyu ne kacal, kuma babu sauye-sauye a tsakanin kallon nesa da kusa, don haka yana da sauki wajen samar da al'amarin priism, wanda galibi ake kiransa "Jump image".Kuma yana da sauƙin faɗuwa lokacin sanya shi, wanda ba shi da lafiya ga masu sawa, musamman ma tsofaffi.
Abu na biyu, wani babban hasashe na ruwan tabarau na bifocal shine cewa idan ka duba a hankali akan ruwan tabarau na bifocal, zaka iya ganin layin rarraba tsakanin digiri biyu akan ruwan tabarau.Don haka ta fuskar kwalliya, ba zai yi kyau sosai ba.Dangane da keɓantawa, saboda bayyanannun halayen lens na bifocal, yana iya zama abin kunya ga masu ƙarami.
Bifocal ruwan tabarau na kawar da matsala na yawan cirewa da sawa na myopia da presbyopia.Suna iya gani sosai a nesa da kusa, kuma farashin yana da arha;amma yankin nesa na tsakiya na iya zama blush, kuma aminci da ƙayatarwa ba su da kyau.
2. Masu ci gaba
Lenses masu ci gaba suna da maki masu yawa, don haka kamar ruwan tabarau na bifocal, sun dace da mutanen da ke da gajeren hangen nesa da presbyopia.Ana amfani da ɓangaren sama na ruwan tabarau don ganin nisa, kuma ana amfani da na ƙasa don ganin kusa.Amma sabanin ruwan tabarau na bifocal, akwai yankin canji ("yankin ci gaba") a tsakiyar ruwan tabarau na ci gaba, wanda ke ba mu damar yanki mai daidaitawa don ganin nesa daga nesa zuwa kusa.Baya ga sama, tsakiya, da kasa, akwai kuma wurin makaho a bangarorin biyu na ruwan tabarau.Wannan yanki ba zai iya ganin abubuwa ba, amma yana da ɗan ƙarami, don haka ba ya shafar amfani.
Dangane da bayyanar, ruwan tabarau masu ci gaba ba su bambanta da gilashin hangen nesa guda ɗaya, kuma ba za a iya ganin layin rarraba cikin sauƙi ba, saboda kawai mai ɗaukar ruwan tabarau na ci gaba zai iya jin bambancin iko a wurare daban-daban.Ya fi dacewa ga waɗanda ke son kare sirrin su.Dangane da aiki, yana iya biyan bukatun gani nesa, tsakiya da kusa.Ya fi dacewa don kallon nisa na tsakiya, akwai wani yanki na canji, kuma hangen nesa zai zama mafi bayyane, don haka dangane da tasirin amfani, masu ci gaba kuma sun fi bifocals.
Lokacin aikawa: Juni-30-2023