Uvavanyo olubonakalayo kwintsimi yindlela yokulinganisa intsimi yakho ebonakalayo, okanye ubuninzi obungayibona kwicala ngalinye ngeli xesha ugxininise amehlo akho kwinqanaba eliphambili (umbono wesiphelo). Ukuqhuba uvavanyo lwentsimi ebonakalayo kuthiwa yi-perimetry.
Umlinganiselo omnye womsebenzi wakho obonakalayo kukuba ufunde iileta kwisatifiketi se-acuity chart. Lo ngumlinganiselo wombono wakho oyintloko kunye nxalenye ebalulekileyo yombono wakho.
Nangona kunjalo, loo nto yodwa imilinganiselo yomsebenzi wakho obonakalayo. Enye into ebonakalayo yintsimi yakho ebonwayo, ngezinye izihlandlo ekubhekiswa njengombono wendlela. Nangona abaninzi abantu bayiphutha nje njengemvavanyo yembonakalo yembonakalo, ukuvavanywa kwintsimi ebonakalayo yenzelwe ukulinganisa yonke indawo yombono njengoko ityhilwa yingqondo kwiine quadrants ezine ze-neurological. Iindidi ezahlukeneyo zobuchopho bakho zilawula iingxenye ezahlukeneyo kwintsimi yakho. Iziphumo zolu vavanyo lwimihlaba ngethuba ngamanye amaxesha lunokunceda amayeza atyhila.
Ukulinganisa iNsima Yakho Yokubonwa
Kukho iindlela ezahlukeneyo zokuqhuba uviwo lokuhlola ummandla. Indlela eqhelekileyo yokulinganisa iine quadrants kwintsimi ebonakalayo kukukwenza "iimbambano ze-neurologic" ezibonakalayo. Le yindlela eqhelekileyo yokuyilinganisa. Bobabini i-optometrists kunye ne-ophthalmologist benza iinkalo ezibonakalayo ezijongene nale ndlela ngexesha loviwo olujonge amehlo.
Yenziwa ngokuba ugqirha okanye ochwephezi ehleli kwinqanaba leso kunye nesigulane. Iliso elinye lifihliwe. Elinye iliso lijolise ngqo kwiiyunithi kunye nelinye, iminwe okanye iminwe emine ibanjwe nganye kwiine quadrants ezine. Isigulane asivunyelwe ukuhambisa iso okanye ukujonga iminwe kodwa kufuneka siphendule ngeminwe emininzi isicwecwe.
Emva kokuba zonke iine quadrants zivavanywa, elinye iliso lilinganiswa.
Xa ilahleko lembonakalo yembonakalo ifunyenwe ngendlela yokubala komnwe okanye ukuba ugqirha ugxeka ukutshintsha kwimihlaba yembonakalo, indlela eya kusemthethweni iya kusetyenziswa njenge-automated perimetry. I-perimeter eyenziwe ngokuzenzekelayo yinto ekhompyutheni eyenza intsimi ngezibane ezahlukeneyo zobukhulu nobukhulu. I-perimeter eyenziwe ngokuzenzekelayo iyakwazi ukuqhuba iintlobo ezahlukeneyo zemivavanyo yesimo ngendlela yefowuni. Uvavanyo lwendawo lubeka abantu "nje ngokubonakalayo" kwaye lubonisa indlela enokukhathazeka ngayo isigulane okanye angenakufumana iziganeko ezijongwa njengesiqhelo.
Ezi mapu zobuzwe obubonakalayo zibaluleke kakhulu ekuhloleni izifo zenkqubo ebonakalayo. Iipatheni ezahlukeneyo zokulahleka okubonakalayo zifumaneka kwizifo zeso, i-optic nervous system system.
Izizathu zokubangela iziphumo ezingavamile zokuhlola iziphumo zibandakanya oku kulandelayo:
- Glaucoma
- Sikashukela
- Igazi elonyukayo
- Isifo sokugubhuka
- I-Optic nerve glioma
- Hyperthyroidism
- Izifo zengcebele
- Iingxaki zesistim seentloko, ezifana nesifo esiqhoqhaqhayisa esinye sezixhobo ezibonakalayo zobuchopho bakho
Emva kokuba i-defect field field defected, oogqirha bavame ukuphinda ukuvavanya amaxesha ambalwa ukuqinisekisa iziphumo.
Uvavanyo lwezityalo ezibonakalisiweyo luyixhobo esinamandla kakhulu. Nangona kunjalo, iziphumo zixhomekeke kwinqanaba lokuhlola. Xa umntu sele egqibe ubuncinane uvavanyo olulodwa, ngokuqhelekileyo benza ngcono kangangoko kwixesha lesibini. Uvavanyo lokugqibela alufane luyenziwe de emva kokuba isigulane siphindaphinda ubuncinci ubuncinane kabini kwaye ngamanye amaxesha nangesithathu. Ngenxa yokuba iiyunithi zokuvavanywa kwendawo yokuzibona zinekhomputha kuzo, ukunyaniseka kovavanyo kuya kulandelwa. Ezinye iinkalo zibalwa ukulawula impazamo yomsebenzisi kwaye unike ugqirha othile umlinganiselo wokuthembeka.