Walwal ma leh - taasi macnaheedu maaha inaad xidhato bifocals ama trifocals aan fiicnayn. Dadka intooda badan, muraayadaha horusocod ee bilaa layn ah ayaa ah ikhtiyaar aad uga wanaagsan.
Waa maxay lenses horusocod ah?
Lenses horusocod ah waa muraayadaha muraayadaha indhaha oo badan oo aan khad lahayn oo u eg lenses-arag oo keliya. Si kale haddii loo dhigo, muraayadaha horusocodku waxay kaa caawin doonaan inaad si cad u aragto dhammaan masaafooyinka iyada oo aan kuwa xanaaqsan (iyo da'da qeexaysa) "khadadka bifocal" ee ka muuqda bifocals iyo trifocals caadiga ah.
Awoodda muraayadaha horusocodku waxay si tartiib tartiib ah isu beddelaan min dhibic ilaa bar dusha muraayadda, iyagoo siinaya awoodda muraayadda saxda ah ee si cad loogu arko walxaha masaafo kasta.
Bifocals, dhanka kale, waxay leeyihiin laba awood oo lens oo keliya - mid si cad loogu arko walxaha fog iyo awoodda labaad ee qaybta hoose ee muraayadda si loogu arko si cad masaafo akhris oo cayiman. Isku xirka u dhexeeya aagagga korantada ee kala duwan waxaa lagu qeexay "khadka laba-geesoodka ah" ee muuqda oo gooya bartamaha muraayadda.
Lenses horusocod ah, mararka qaarkood waxaa loo yaqaan "no-line bifocals" sababtoo ah ma haystaan xariiqdan laba-geesoodka ah ee muuqda. Laakin lenses horusocod leh ayaa leh nashqad dhinacyo badan leh oo aad uga horumarsan marka loo eego bifocals ama trifocals.
Muraayadaha horusocodka leh, badanaa waxay bixiyaan raaxada iyo waxqabadka ugu fiican, laakiin waxaa jira noocyo kale oo badan iyo sidoo kale hawlo dheeraad ah, sida muraayadaha horumarka leh ee sawir-qaadista, muraayadaha horumarka buluuga ah iyo wixii la mid ah, iyo agabyo kala duwan. Waxaad ka heli kartaa mid ku habboon naftaada boggayagahttps://www.universeoptical.com/progressive-lenses-product/.
Dadka intooda badan waxay bilaabaan inay u baahdaan muraayadaha indhaha ee kala duwan wakhti ka dib da'da 40. Tani waa marka isbeddelka gabowga ee caadiga ah ee isha ee loo yaqaan 'presbyopia' ay yareyso awoodda aan si fiican wax u aragno meel dhow. Qofkasta oo qaba presbyopia, lenses horusocod ah ayaa leh faa'iidooyin muuqaal iyo isqurxin oo muhiim ah marka la barbar dhigo bifocals-dhaqameedka iyo trifocals.
Naqshadaynta lenses-ka-horusocodka leh ee lenses-ka-horusocodku waxay ku siinayaa faa'iidooyin muhiim ah:
Waxay bixisaa aragti cad dhammaan masaafada (halkii ay ka ahaan lahayd laba ama saddex masaafo kala duwan oo daawasho ah).
Waxay meesha ka saartaa dhibka "boodboodka sawirka" ee ay keenaan bifocals iyo trifocals. Tani waa halka walxaha si lama filaan ah ugu beddelaan cad iyo booska muuqda marka indhahaagu ay ka gudbaan xariiqyada muuqda ee muraayadahan.
Sababtoo ah ma jiraan "xariiqo bifocal" oo muuqda oo ku jira muraayadaha horumarka, waxay ku siinayaan muuqaal dhalinyaro ah oo ka badan bifocals ama trifocals. (Sababtan oo keliya ayaa laga yaabaa inay tahay sababta ay dad badani maanta u xidhaan muraayadaha horumarka leh marka loo eego tirada xidhan bifocal iyo trifocals oo la isku daray.)