Ngengxaki yokubuyiselwa kwamehlo, phantse kuthiwa sonke sihlala sidibana. Ubomvu kwenzeka xa imithwalo yegazi emehlweni eqala ukwandisa. Isizathu salokhu kukunyuka kweengcinezelo kwi-capillaries, ngenxa yokuba ngumthwalo omude kakhulu emehlweni, ukukhathala okunzulu kunye nempembelelo yezinye izinto.
Kwakhona, ngaphezu kwezobhengezo, imivimba yegazi ebomvu ingabangela izizathu ezahlukeneyo. Ngexesha elifanayo, ngezizathu ezahlukeneyo, iimfuno ezihlukeneyo ziyadingeka. Abanye bacetyisa ukungenelela kwonyango lwangoko kunye nokunakekelwa kwezonyango, okokugqibela kunokufuna ukubonisana nodokotela, kwaye okwesithathu, unonophelo lwonyango alufunwa nhlobo. Kwimeko nayiphi na imeko, kufuneka uqaphele zonke iimpawu ezihamba kunye nobomvu, ukusuka ebusweni bobunzima kunye nesantya sobomvu kunye neempawu ezizimeleyo.
Ubumvu belihlo livela kwandiswa kwemithambo yegazi ehlotsheni elimhlophe (i-sclera). Oku kunokwenzeka ngenxa yezizathu ezininzi, kodwa kaninzi ngenxa yokuba umoya oomileyo unomsindo ngamehlo, uthuli okanye izidumbu zangaphandle zingena kwiso, ukukhanya kwelanga, ukuphazamiseka, okanye ngenxa yokulimala okanye ezinye izifo. Ukuba ukuhlengahlengwa kwamehlo kwenzeka rhoqo, kubangelwa ukuba kukho ukukhwehlela okanye ubunzima bomzimba. Emva koko ukubonakala kwamacandelo amancinci egazi kwindawo yesibhakabhaka inokwenzeka. Elinye igama lala mabala egazi lixhomekeke kwi-hemorrhage. Nangona le nto ibonakala iyingozi, ayiyingozi kwimpilo, ukuba akukho ntlungu. Dlula loo mabala, njengomthetho, kwiiveki ezimbalwa.
Ukuvutha, kunye nenkqubo echaphazelayo inokuvela kuyo nayiphi na indawo yeso. Ngexesha elifanayo, ngaphezu kokubomvu, iliso lingaziva lusizi, intlungu, kukho ukukhutshwa kunye nokukhubazeka okubonakalayo.
Izizathu ezinokwenzeka zibandakanya ezi zifo zilandelayo.
- Blepharitis. Yinkqubo yokuvuvukala ye-eyelash follicles, ekhoyo kwiphephelo. Ivela ngenxa yebhakteria yesikhumba. Ngesi sifo, iimpawu zibonwa, ezifana nokubunjwa kwe-cortex kwiinkophe kunye nokubetha.
- I-Conjunctivitis ukuvuvukala okanye ukusuleleka kwimbumba ebhekise phambili kwamehlo okanye iinkophe. Kubantu, esi sifo sisoloko sibizwa ngokuba "isohlozi". Izizathu zokuvela kwayo ziyi-bhakteria, intsholongwane, ukungabikho komzimba okanye ukucaphuka. Kwimeko apho i-conjunctivitis ibangelwa yi-bhakteria okanye intsholongwane, isifo sisasazekayo.
- Izilonda ze-cornea (igobolondo yangaphandle yelihlo) linokubangela ubomvu bamehlo. Ubume bezinto ezivela kuzo, njengomthetho, i-virus okanye ibhaktheriya.
- Ukuvuvukala kwe-choroid yesiso.
Esinye sezizathu ezibangelwa ukubuyiswa kwakhona kwamehlo kunokutshabalala kwe-choroid yesiso. Ukuvuvukala kungabangelwa ngumonakalo onobungozi, isifo esizimele okanye isifo.
Ukongezelela kwezi zilapha ngentla, izizathu zokubomvu kweso le-sclera zingaba:
- Umzimba wasemzini, owathi, uselehlweni, uyamkhathaza;
- izikrakra ezixubileyo ngenxa yothuli, ii-lens zokuxhumana, isanti, njl.;
- kubanda kakhulu okanye kudla;
- ukuphuma, okwenzekayo, umzekelo, ngenxa yokugqithisa kweziyobisi ezinciphisa i-coagulability yegazi;
- ukunyuka okubukhali kunye nobuhlungu kakhulu ekunyanzelekeni kwe-intraocular - ukuhlaselwa kwe-glaucoma. Le nto ibandakanya ukukhubazeka okubonakalayo okunzulu. Kwimeko yokuhlaselwa, kuyimfuneko ukukhawuleza uncedo lwezokwelapha. Ngokuqhelekileyo, i-glaucoma ikhula ngokukhawuleza.
Ukunika ikhondo elifanelekileyo lonyango, kufuneka uqinisekise isizathu ngokuchanekileyo. Kukulungele ukufuna iingcebiso zeengcali. Ugqirha kuphela onokuchonga ngokuchanekileyo ukuxilongwa nokunika unyango oluyimfuneko.
Ukuba iimpepha zegazi ezibomvu zigcinwa kuwe rhoqo, kufuneka uhlale unxibelelana nodokotela. Ubomvu obungapheliyo kweso lungavela ngenxa yokuphendula, ukuphazamiseka kwezifo ezahlukahlukeneyo kunye neamehlo. Kule meko, akuvumelekanga ukuba asebenzise unyango.