Abaninzi baye bakuva malunga neengxaki ezinxulumene neminyaka yabantu abaninzi abanxulumene nombono ongenakwenzeka. I-Myopia okanye i-hyperopia iqala ukuphuhlisa-kodwa kungeyena wonke umntu owaziyo ukuba yintoni kanye. Ngoko, abantu abaphakathi-ubudala, i-ciliary muscle ilahlekelwa yinkqubo yayo yokuqala kwaye ayikwazi ukuthenga isivumelwano okanye ingxaki. Oku kukhokelela ekutshintsheni okwaneleyo kwi-lens. Kwaye inxalenye yeso ngokwayo ilahlekelwa ukunyaniseka kwayo kwaye ayikwazi ukutshintsha njengaphambili. Kwaye oku kubangela ukungaboni kakuhle.
Umehluko phakathi kwe-hyperopia kunye ne-myopia
Nge-myopia, umntu unokubona ngokucacileyo izinto ezikufutshane. Kodwa umbono kumgama usuvele uphazamisekile, kwaye yonke imifanekiso ibonakala ngathi, kwintlaka. Ukuba ukujonga kwangaphambili kubonakala, abantu ngokuchaseneyo banokubona ngokucacileyo izinto ezikude. Olunye umehluko ngumvelaphi wesifo. I-Hyperopia ngokuqhelekileyo ikhula kunye neminyaka, kwaye i-myopia idla ngokubakho ngenxa yokungaqhelekanga kwemfuyo, ngoko ke oko kudla ngokubonakala kubantwana abaselula.
Abaninzi abazi indlela yokuchonga nokuqonda, i-myopia okanye i-hyperopia, nokuba ingaba kukho nayiphi na isifo. Ukwenza oku, unokuqhuba ukuzama okulula: zama ukufunda incwadi kwimiba eyahlukileyo kwamehlo. Ukuba itekisi ibonakala ngokulinganayo kumgama okanye kufuphi - kunye naso onke amehlo kwaye ungakhathazeki. Ukuba amagama angatshatyalaliswa, xa le ncwadi ikufuphi - oku kubonisa ukujonga okufutshane. Ukuba ngokuchaseneyo - kuphela kumgama ubonakala - ukujonga phambili. Kodwa kungcono ukutyelela ugqirha.
Ukujongwa kwangaphambili kunye nokujonga kwangaphandle
Kukho imeko xa umntu eqala ukubona izinto ezikude kunye nezinto ezikude. Into leyo kukuba iindawo ezahlukeneyo zamehlo ziyakwazi ukubetha amaza okukhanya. Kubonakala ukuba i-boram ayigxile kwinqanaba elinye. Olu hlobo lentsholongwane lubizwa ngokuthi " astigmatism ". Unayo iipropati ezibonakalayo kwizinto ezikufuphi kunye nokujonga.
Esi sifo singabonakala njengesiphumo sezinto ezininzi:
- yokuzalwa kwengqondo;
- ukucoceka kococeko lwezitho zombono;
- umonakalo xa kwenzeka ukulimala;
- sebenza.
Ngokuqhelekileyo kuba lunomdla kubantu ukuba i-myopia ingena kwi-hyperopia, okanye ngokuphambene. Akukho mpendulo engaqinisekanga. Kodwa kuyacaca ukuba ngokuqhelekileyo ezi zifo zidibanisa kuphela. Ingxaki ibonakaliswe ngumbono otyhafile, ukukhathala kwesohlo ngokukhawuleza kwaye rhoqo kukhanda. Ukuba ukukhubazeka kunesimo esibuthakathaka, ngoko ngokuqhelekileyo umntu akafumani nantoni na into engathandekiyo. Kwiimeko ezininzi, izigulane zifunda malunga ne-astigmatism kuphela emva koviwo kunye neengcali ezifanelekileyo.
"Minus" - ingabe i-myopia okanye i-hyperopia?
Ngokuqinisekileyo, kunokuthiwa "ukuthatha" kukubona okufutshane. Iinezigaba ezintathu zophuhliso:
- buthathaka;
- umyinge;
- phezulu.
Esi sifo siqulethwe ukuba into ekujoliswe ngayo emfanekisweni ihamba phambi kwe-retina, kwaye ingekho kuyo. Ngoko iliso alinakukwazi ukubona izinto ezikude.
Kule meko, iiglasi kunye neelensi zokunxibelelana kufuneka zibe ne-diopter engalunganga. Ngokuxhomekeke kwinqanaba lesifo, iindlela zokuphucula umboniso zichazwe kwisigxina okanye sisigxina kuphela
Xa uneminyaka yobudala, ugulo luyehla, ngoko ngoko kufuneka uguqule iilensi okanye iiglasi kwiziglasi kulabo abaya kuhambelana nomntu ngeli xesha.
Ukuba imbono "kunye" - i-hyperopia okanye i-nearsightedness?
Ukuba igosa libeka iilazi ngeelensi "kunye", ngoko isigulane sinombono omude. Inemigangatho efanayo yophuhliso. Kodwa ukubonakalisa kuyahluke: umfanekiso uphambili emva kwe-retina, okwenza kube nzima ukuhlola izinto ezikufuphi.