Le blindness eyingozi ngakumbi, ikhephu kunye cortical

Kukho iindidi ezahlukeneyo disorder xa umntu uyayeka ukuba abone ngongcwalazi, ekukhanyeni eqaqambileyo, okanye nje iyafika yimfama epheleleyo. Makhe sibone, ziziphi iintlobo ezithile blindness ngalo bahambisana, yaye yintoni uhlobo uncedo unako unganikeza.

ebusuku-blindness

Ukuba umntu a licuthe Ngokuhlwa, banesifo ngobumfama ebusuku. Igama sifo ngenxa yokuba amantshontsho ngongcwalazi nobumnyama banokulahlekelwa kukuba nako kwabo ukubona kakuhle. Kwaye ke ngakumbi yokwenza iinkuku, esi sifo hhayi.

Phambi kokuba revolution eRashiya, isifo kwaba ngumlinganiswa ubunzima uluntu lwasemaphandleni, ingakumbi kuxhotyiwe entwasahlobo.

Indlela yokuba valiweyo umbono ilanga ngokubanzi kukuba ngokuqhelekileyo umntu kwandisa kakhulu susceptibility ukuya ukukhanya ebumnyameni. Ikhono lithathelwe emnyama ezinjalo ngenxa uyondelelwano lwee- rhodopsin, oluqulathe vitamin A. Xa vitamin emzimbeni akwanelanga, ngoko ke rhodopsin ngesi mpimo lowutsongo, kwaye iliso ulahlekelwa ukukwazi layo ukuphendula ngokufanelekileyo nokuqalisa lobumnyama.

Ngoko ke ukungaboni neyayanyaniswa ukunqongophala olubonakalayo okanye ingalingani ngenxa kumzimba iivithamini A kunye PP, kwakunye B iivithamini Iingxaki umbono othile ngorhatya - Nguwo lo ke umqondiso kakhulu ekuqaleni ukuphazamiseka emzimbeni.

Hi ndlela leyi, izazinzulu ziye zafumanisa ukuba abantwana boyika yobumnyama ayikho ngenxa intsomi ezoyikekayo okanye umfanekiso wabo. Olu loyiko kungenziwa ezinxulumene ngqo wabonakala ngenxa yokuqaqadeka yabo ebusuku kunye nokungabikho iivithamini kuyimfuneko.

Kukho nezinye izinto ezibangela sifo:

- diabetes;

- cataract;

- izifo kwiretina.

Kodwa ukuba ezi oonobangela ababandakanywa, kodwa kuyimfuneko ukuba niwuzalise lomncono umzimba iivithamini yokungaboni wadlula. Ukuze wenze oku, oogqirha ukumisela ngeedosi eziphezulu iVitamin A ngokusebenzisana B6 riboflavin kunye novithamini. Ikhosi ye unyango - ukusuka kwiiveki ezimbalwa ukuya ngenyanga, ngokuxhomekeke ubukhali iimpawu.

Kufuneka kukhunjulwe ukuba, ngeedosi eziphezulu, Vitamin A uba ityhefu, ngoko anenzondelelo kakhulu okanye self-medicate kule meko yinto engenakwenzeka.

Ukuvimbela, kufuneka udle rhoqo womnqatha ze ithanga, nangexesha - apricot kunye neetamati.

snow-blindness

Esi sifo esibonakaliswa kwelanga eliqaqambileyo kakhulu, ingakumbi xa ilanga ibonakaliswa ukusuka kumphezulu ikhephu. Ngoko ke umntu intlungu emehlweni, iinyembezi flow, kukho photophobia. Retina abantu abanjalo ethe kakhulu ukukhanya UV, nto leyo ekhokelela aleji ukukhanya okuqaqambileyo.

Kutheni ukusabela okunjalo kwenzeka kusebusika? Into yokuba ukukhanya yelanga kubonakala ukusuka ikhephu, kuba nempembelelo enamandla ngakumbi. Oku kunokubangela ukutsha le retina kunye nelahleko nombono iintsuku ezimbalwa. Xa isifo wobulali ngakumbi, kukho ububomvu kunye ukudumba iliso, kukho utshintsho nombala elibangqongileyo.

Kuba ikhephu Uthintelo kubumfama Kucetyiswa ukuba ukunxiba iindondo xa kufuneka ukuba aphume, aye kuloo ukukhanya kwelanga ngosuku yasebusika ngekhephu eqaqambileyo. Yiloo nto climbers kunye abaqubhi uqinisekile ukuba ukukhusela amehlo akho.

blindness cortical

Esi sifo ubonisa ilahleko ngesiquphe ngokupheleleyo umbono. Unobangela ubumfama cortical - kakuhle kwegazi iindawo cortical obuchopho. Esi sifo ayikho ezizimeleyo, kwaye kuvela njengesiphumo yegazi kunye noxinzelelo lwegazi. Ityhefu yelothe umzimba okanye carbon monoxide nako kukhokelela kubumfama cortical.

Imbonakalo ngokungaboni cortical idla lwandulelwe ixesha ukulahleka kwenxalenye kwamasimi ezibonwayo.

ubumfama Cortical ibhekisa iintlobo kwinqanaba luvo kukwenzakala, ngoko xa iimpawu zokuqala imfuneko engxamisekileyo ukuba afune uncedo kuphela ukuba ugqirha wamehlo, kodwa emine.