EzempiloUmbono

Yini eyingozi ebumnyameni ubumpofu, iqhwa nama-cortical

Kunezinhlobo ezehlukene zokuphazamiseka kombono, lapho umuntu eyeka ukubona kusihlwa, ekukhanyeni okukhanyayo, noma ngokuzumayo kufika ubuphofu obuphelele. Ake sibone ukuthi yiziphi izinhlobo eziyimpumputhe ezikhona, ukuthi zihlobene ngani, nokuthi yiluphi usizo olunganikezwa.

Ukuphuphuthekisa inkukhu

Uma umuntu enombono omncane lapho kuqala ubumnyama, khona-ke uthola ukuthi unobumpumputhe ubusuku. Igama lesi sifo kungenxa yokuthi ama-hens kusihlwa kanye nobumnyama alahlekelwa amandla okubona kahle. Futhi akukho lutho olwenziwe nezinkukhu.

Ngaphambi kokuguqulwa eRussia, lesi sifo sasisakazeke phakathi kwabantu basemaphandleni, ikakhulukazi esikhathele entwasahlobo.

Indlela yokwakhiwa kombono we-twilight ngokwemigomo jikelele yilokhu: ekuzweleni komuntu okujwayelekile ukukhanya ebumnyuka kwanda kakhulu. Ikhono lokuzivumelanisa okunjalo kumnyama ngenxa yokuhlushwa kwe-rhodopsin, equkethe i-vitamin A. Uma i-vithamini emzimbeni enganele, i-rhodopsin ikhishwa ngamanani amancane, futhi iso lilahlekelwa ikhono layo lokuphendula ngokwanele ekuqalekeni kobumnyama.

Ngakho-ke, ubumpumputhe obubusuku buhlotshaniswa nokuntuleka okuphawulekayo emzimbeni wamavithamini A kanye ne-PP, kanye namavithamini okuthiwa i-B. Umbono we-Twilight uyisibonakaliso sokuqala sokuphazamiseka okukhulu emzimbeni.

Ngendlela, ososayensi bathole ukuthi izingane zingesaba ubumnyama hhayi ngenxa yezinganekwane ezimbi noma izifiso zabo. Lezi zinkinga zingahlobene ngokuqondile nokubonakaliswa kobumpofu babo bobusuku nokuntuleka kwamavithamini adingekayo.

Kunezinye izimbangela zesifo:

- isifo sikashukela mellitus;

- cataract;

- Izifo zokubuyisa.

Kodwa uma lezi zizathu zingekho, kodwa kubalulekile ukugcwalisa ama-vithamini emzimbeni ukuze ubumpumputhe busukule. Ukwenza lokhu, odokotela banquma ukukhululeka kwamavithamini A ngokuhambisana ne riboflavin ne-vitamin B6. Inkambo yokwelashwa ivela emavikini amaningana kuya enyangeni, ngokuya ngobukhulu bezimpawu.

Kumele kukhunjulwe ukuthi ngama-dose amakhulu i-vitamin A iba yingozi, ngakho-ke akunakwenzeka ukuba ushiseke kakhulu noma uzenzele imithi kulokhu.

Ukuze ukuvimbela kufanele njalo udle izaqathe kanye neqoma, futhi ngenkathi - ama-apricot kanye notamatisi.

Ukuphuza kweqhwa

Lesi sifo sibonakala ekukhanyeni kwelanga, ikakhulukazi uma ilanga liveza ubuso beqhwa. Khona-ke lo muntu ubonakala emehlweni, izinyembezi zigeleza, kukhona isithombe se-photophobia. I-retina kubantu abanjalo inomthelela kakhulu ekukhanyeni kwe-ultraviolet, okuholela emithanjeni kuya ekukhanyeni okukhanyayo.

Kungani ukusabela okunjalo kwenzeka ebusika? Iqiniso liwukuthi i-ultraviolet, eboniswa iqhwa, inomthelela onamandla kakhulu. Lokhu kungaholela ekushiseni kwe-retina nokulahlekelwa umbono izinsuku ezimbalwa. Ngenkambo elula yesifo, ubomvu nokuvuvukala kwamehlo kwenzeka, ukuguqulwa kwesibindi okuzungezile kuzoshintsha.

Ukuze kuvinjelwe ukuphuphutheka kweqhwa, kunconywa ukugqoka izibuko zokubukela uma kudingeka ukuba uphume ilangeni elikhanyayo ngosuku lwamaqhwa ebusika. Yingakho izintaba nezintaba ze-alpinists zivikela amehlo abo.

Ubumpumputhe bokuqondisa

Lesi sifo sibonakala ngokulahlekelwa okungazelelwe kombono. Imbangela yokuphuphuthekisa i-cortical iphula ukweqa kwegazi ku-lotical cortical yobuchopho. Lesi sifo asizimele, kodwa sikhuphuka njengesiphumo se-atherosclerosis nomfutho wegazi ophezulu. Ukufaka umuthi emzimbeni nge-lead noma carbon monoxide nakho kungabangela ukuphuphutheka kwe-cortical.

Ukubonakala kobuphofu be-cortical ngokuvamile kulandelwa isikhathi sokulahlekelwa okuncane kwamasimu okubukwayo.

Ukuphuphuthekisa kobuchopho kubhekisela ezinhlobonhlobo zezinzwa zokulimala okubonakalayo, ngakho-ke lapho kubonakala khona izimpawu zokuqala kudingekile ukuba ufune usizo oluphuthumayo hhayi kuphela ku-oculist, kodwa nakwe-neurologist.

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