Bisa kididdigar da Hukumar Lafiya ta Duniya (WHO) ta yi, yawan mutanen da ke fama da cutar myopiamafi girmaa cikin mutanen da ke da idanu marasa lafiya, dayana daisaed2.6 biliyan a 2020. Myopia ya zama babbar matsala a duniya, musamman mai tsanania Asiya.Adadin myopia a China shine 47.1%, kusan rabin yawan jama'a.Yana nufin dayaa cikin kowane mutum biyu akwai kusantar gani.
Yawan Myopia a Kasashe Daban-daban
A halin yanzu,tare dada gagarumin karuwa a myopia rate, da kudi nasawaGilashin kuma yana karuwa kowace shekara.A matsayin daya daga cikinmmarasa lafiya, haku kukula da factorsyan deƙare daingancin ruwan tabarau lokacin la'akariidosa zane da aikin ruwan tabarau?
Bari mu koyi wani abumuhimmancit game da daruwan tabarau abu da refractive index.
Kyakkyawan ruwan tabarau yana buƙatar daidaituwa.watsawada tsabta.Tya fi kowa ruwan tabarau a yau shine sakamakon shekaru na bincike.
| Ci gaban kayan ruwan tabarau Yawancin ruwan tabarau na farko an yi su da hannu tare da kayan halitta kamar ma'adini da crystal.Tare da haɓaka samar da gilashin da fasahar masana'antu, an maye gurbin kayan halitta da sauri da gilashin gani wanda ya fara samar da ƙarin ayyuka.Daga shekarun 1960 zuwa 1980, kayan resin, da aka yi daga man petur, sun maye gurbin gilashin don ingantattun kaddarorinsa na gani, amintaccen aiki da siraran jiki, kuma sun zama babban kayan ruwan tabarau na ido har zuwa yanzu. |
A matsayin mafi mashahuri kayan ruwan tabarau a kasuwa, kayan guduro galibi suna wakiltar resin CR-39 wanda PPG ya haɓaka, resin MR wanda Mitsui ya haɓaka,kumaKR resin ya haɓaka ta KOC, Koriya, da sauransu.
Abun ruwan tabarau yana ƙayyadadden ƙididdiga mai jujjuyawa na ruwan tabarau.Fihirisar refractive Lens shine rabon saurin yaɗa haske a cikin injin ruwa zuwa saurin yaɗuwar haske a cikin kayan ruwan tabarau, yana nuna ƙarfin juzu'i na ruwan tabarau zuwa haske.Gabaɗaya magana, mafi girman maƙasudin refractive na ruwan tabarau, mafi ƙarancin ruwan tabarau.
A halin yanzu,Universe Opticalyana da index refractive na 1.50, 1.53, 1.56, 1.60, 1.67, 1.74 da sauransu.fihirisa naruwan tabarau.Dangane da kayan, mun kiyaye haɗin gwiwa tare da PPG na Amurka da Mitsui Chemical na Japan.har dasauran kamfanonin albarkatun kasa tare da manyan nasarori.
CR-39 albarkatun kasa da aka saya daga PPG, Amurka, ana amfani da su don yin ruwan tabarau 1.50 mai jujjuyawa.An fi fifiko a kasuwa bsaboda high Abbe coefficient, kyakkyawan aikin gani, aikin amincikumamafi tsada-tasiri.
An samo ruwan tabarau mai jujjuyawa 1.53 daga wani abu na musamman, Trivex, kuma daga PPG a Amurka.Kayan ruwan tabarau na Trivex yana da matukar juriya.Saboda sun fi sauƙi fiye da ruwan tabarau na yau da kullun, ruwan tabarau na Trivex sunemai kyau sosaizabi na kayan ido na yara, rigunan ido maras kyau, tabarau na wasanni, gashin ido na aminci, da kayan ido na motsa jiki.
Tare daci gaba of gilashin, "ruwan tabarau", a matsayin babban kayan haɗin gilashi, yana ci gaba da haɓakawa da haɓakawa tare da canjin lokaci.DuniyaNa gani 1.60, 1.67, 1.74babbaindexruwan tabarau albarkatun kasa an yi su da MR jerin Mitsui Chemical.jerin MRsu ne high quality da ci-gaba kayan, tare da high refractive index, high Abbe lambar, low takamaiman nauyi, high tasiri juriya da sauran abũbuwan amfãni.
Ci gaba da haɓaka kayan ruwan tabarauR&Dda fasahaingantaruwan tabarau samfurinsinnovation.The ruwan tabarau raw kayanƙayyade dakwanciyar hankalina inganci, watsawa, tsabta da tasirin gani.
DuniyaTantancewar gani ta kasance tana bin manufar haɗin gwiwa tare da nasara da nasara.Musauraron muryar abokan ciniki,saniabokin cinikis'bukatun, kula da kasuwahali, haka asdon ƙirƙirar hangen nesa mai haske.