Muraayadaha muraayadaha indhaha ayaa saxa khaladaadka iftiinka iyagoo foorarsanaya (dib u celinaya) iftiinka marka uu dhex marayo muraayadda. Qadarka awoodda leexashada iftiinka (awoodda muraayadda) ee loo baahan yahay si loo helo aragti wanaagsan ayaa lagu muujiyay warqadda dhakhtarka indhaha ee uu kuu qoray.
Khaladaadka soo noqnoqda iyo awoodaha muraayadaha ee loo baahan yahay si loo saxo waxaa lagu cabbiraa cutubyo loo yaqaan dioptres (D). Haddii aad si yar u aragto wax gaaban, warqadda daawada muraayadda ee laguu qoray waxay odhan kartaa -2.00 D. Haddii aad aad u daalan tahay, waxay odhan kartaa -8.00 D.
Haddii aad aragti dheer leedahay, waxaad u baahan tahay muraayado "plus" (+), kuwaas oo ka dhumuc weyn bartamaha iyo geesaha.
Muraayadaha galaaska ama balaastikada caadiga ah ee loogu talagalay aragti gaaban ama aragti dheer waxay noqon karaan kuwo aad u qaro weyn oo culus.
Nasiib wanaag, soosaarayaashu waxay sameeyeen noocyo kala duwan oo ah walxo cusub oo muraayad balaastig ah oo "qiimo sare leh" ah oo si hufan u leexiya iftiinka.
Taas macnaheedu waa in walxo yar loo isticmaali karo muraayadda indhaha sare leh si loo saxo isla qaladka indhaha ee iftiinka, taas oo ka dhigaysa muraayadaha balaastikada indhaha sare leh inay ka khafiifsan yihiin oo ka fudud yihiin muraayadaha galaaska caadiga ah ama muraayadaha balaastikada ah.
Faa'iidooyinka muraayadaha indhaha sare leh
Khafiif ah
Sababtoo ah awooddooda ay si hufan ugu leexiyaan iftiinka, muraayadaha indhaha gaaban waxay leeyihiin geeso khafiif ah marka loo eego muraayadaha oo leh awood la mid ah tan laga sameeyay walxaha balaastikada caadiga ah.
Shidaal
Cidhifyada khafiifka ah waxay u baahan yihiin qalab muraayad yar, taasoo yaraynaysa miisaanka guud ee muraayadaha. Muraayadaha laga sameeyay balaastikada cabbirka sare leh ayaa ka fudud muraayadaha la midka ah ee laga sameeyay balaastikada caadiga ah, sidaa darteed way ku raaxaysan karaan inay xirtaan.
Inta badan muraayadaha indhaha sare leh waxay sidoo kale leeyihiin naqshad aspheric ah, taas oo siinaysa muuqaal caato ah oo soo jiidasho leh isla markaana yareysa muuqaalka weyn ee muraayadaha caadiga ah ay keenaan daawooyinka adag ee aragtida dheer.
Xulashooyinka muraayadaha tusmada sare leh
Muraayadaha balaastikada ah ee leh tusmada sare hadda waxaa laga heli karaa noocyo badan oo tusmooyinka refractive ah, badanaa waxay u dhexeeyaan 1.60 ilaa 1.74. Muraayadaha leh tusmada refractive ee 1.60 & 1.67 waxay noqon karaan ugu yaraan 20 boqolkiiba ka khafiifsan muraayadaha balaastikada caadiga ah, 1.71 ama ka badanna waxay noqon karaan qiyaastii 50 boqolkiiba ka khafiifsan.
Sidoo kale, guud ahaan marka la hadlayo, marka tusmada sare ay sii korodho, ayaa qiimaha muraayadaha indhaha uu sii kordhayaa.
Daawadaada muraayadaha ayaa sidoo kale go'aamisa nooca walxaha tusmada sare leh ee aad u baahan karto muraayaddaada. Agabka tusmada ugu sarreeya waxaa badanaa loo isticmaalaa daawooyinka ugu xooggan.
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