Marka loo eego qiyaasaha Ururka Caafimaadka Adduunka (WHO), tirada dadka qaba cudurka 'myopia' waaugu weynka mid ah dadka leh indho-caafimaad hoosaad, iyowaxeey heesataagaadhaaned2.6 bilyan sanadka 2020. Myopia waxay noqotay dhibaato wayn oo caalami ah, gaar ahaan halis ahAasiya.Heerka myopia ee Shiinaha waa 47.1%, ku dhawaad kala badh tirada guud ee dadka.Waxay la macno tahay midLabadii qofba meel bay u dhowdahay.
Heerka Myopia ee Wadamo kala duwan
Maalmahan,lehkororka weyn ee heerka myopia, heerka ofxidhashadaMuraayadaha ayaa sidoo kale sii kordhaya sanadba sanadka ka dambeeya.Sida mid ka mid ahmayopicbukaanka, haaadigau fiirsaday qodobkastaas dejoojisotayada muraayadda marka la tixgelinayoishaxidho naqshadaynta iyo shaqada muraayada?
Aan wax barannomuhim aht ku saabsan ahMaaddada lens-ka iyo index refractive.
Lens-ka wanaagsan wuxuu u baahan yahay lebbis,gudbintaiyo hufnaan.Tmuraayada ugu caansan maanta waa natiijada sahaminta sanadaha.
| Horumarinta qalabka muraayadda Inta badan muraayadaha ugu horreeya waxaa lagu sameeyay gacanta oo leh qalab dabiici ah sida quartz iyo crystal.Horumarinta wax soo saarka muraayadda iyo tiknoolajiyada warshadaha, alaabta dabiiciga ah ayaa si dhakhso ah loogu beddelay muraayadaha indhaha kuwaas oo bilaabay inay bixiyaan hawlo badan.Laga soo bilaabo 1960-meeyadii ilaa 1980-meeyadii, alaabada xabagta, ee laga sameeyay batroolka, waxay u beddeleen muraayadda si ay u helaan muuqaalkooda wanaagsan, habaynta badbaadada leh iyo sifooyinka jidheed ee khafiifka ah, waxayna noqdeen walxaha ugu muhiimsan ee muraayadaha indhaha ilaa hadda. |
Maaddaama shayga ugu caansan ee lenska ee suuqa, agabka resinka waxaa inta badan matala CR-39 resin oo ay samaysay PPG, MR resin oo uu sameeyay Mitsui,iyoKR resin ay soo saartay KOC, Kuuriya, iwm.
Maaddada muraayadda ayaa go'aamisa index refractive ee muraayadda.Tilmaanta dib-u-soo-celinta lensku waa saamiga xawaaraha faafinta iftiinka ee faakuumka iyo xawaaraha faafinta iftiinka ee walxaha muraayadda, taasoo ka tarjumaysa awoodda dib-u-soocidda muraayadda iftiinka.Guud ahaan, mar kasta oo uu sareeyo index refractive ee lensku, waa uu khafiifsan yahay muraayadda.
Hadda,Universe Opticalwaxay leedahay index refractive 1.50, 1.53, 1.56, 1.60, 1.67, 1.74 iyo kuwa kaletusmooyinkamuraayadaha.Xagga agabka, waxaanu ilaalinaynay iskaashi istaraatiijiyadeed oo dhow oo aan la yeelanay PPG ee Maraykanka iyo Kiimikada Mitsui ee Japansidoo kaleshirkadaha kale ee alaabta ceeriin oo leh guulo la taaban karo.
CR-39 walxo ceeriin ah oo laga soo iibsaday PPG, USA, ayaa loo isticmaalaa in lagu sameeyo index refractive 1.50 lens.Waxaa aad looga fadli badan yahay suuqa bsababtoo ah iskudarka Abbe ee sarreeya, waxqabadka indhaha ee ugu fiican, waxqabadka badbaadadaiyokharash badan oo waxtar leh.
1.53 lenska tusaha dib u soo celinta waxa laga soo qaatay shay gaar ah, Trivex, sidoo kale PPG ee Maraykanka.Qalabka lenska Trivex aad buu u adkaysanayaa.Sababtoo ah waxay ka fudud yihiin muraayadaha caadiga ah, lenses Trivex waaaad u wanaagsandoorashada muraayadaha indhaha ee carruurta, muraayadaha indhaha ee aan xiniinyaha lahayn, muraayadaha ciyaaraha, muraayadaha indhaha ee badbaadada, iyo muraayadaha indhaha ee ciyaaraha fudud.
Iyada oo lehhorumarka of muraayadaha, "lens", oo ah qalabka ugu muhiimsan ee muraayadaha, ayaa si joogto ah u cusbooneysiinaya oo u cusbooneysiinaya isbeddelka waqtiyada.CaalamkaMuuqaalka 1.60, 1.67, 1.74sareindexAlaabta ceeriin ee lensku waxay ka samaysan yihiin taxane MR ee Kiimikada Mitsui.taxanaha MRwaa qalab tayo sare leh oo heersare ah, oo leh index refractive sare, tirada Abbe sare, cuf-jiid gaar ah oo hooseeya, iska caabin sare oo saameyn leh iyo faa'iidooyin kale.
Horumarinta joogtada ah ee walxaha muraayadahaR&Diyo farsamadakor u qaadkaalaabta muraayaddasinnovation.Qalabka ceeriin ee muraayaddago'aaminxasiloonidatayo leh, gudbinta, caddaynta iyo saamaynta muuqaalka.
CaalamkaAragtidu waxay u hoggaansanayd siyaasadda iskaashiga guul-guud iyo guul-gaarista labada dhinac.Anagadhegayso codka macaamiisha,baromacmiilkas'baahida, u fiirso suuqau janjeera, sidaas sidasi loo abuuro aragti cad.