Ukuba nomlinganiselo ophezulu ngaphezu kweso liso okanye ukulinganisa kwentsholongwane ngaphakathi kweso libeka umntu osengozini enkulu yokuphuhlisa i- glaucoma . Abanye abantu banokuba noxinzelelo lwamehlo aphezulu, kungekho glaucoma kunye nabanye abantu abanokuba neengcinezelo zamehlo ezantsi, kunye ne-glaucoma ecacileyo. Nangona kunjalo, ngokuqhelekileyo, ukuphakanyiswa kwamehlo, ingozi enayo yokuphuhlisa i-glaucoma.
Ngoku kukholelwa ukuba ubukhulu be-corneal budlala indima ebalulekileyo ekuchazeni ngokuchanekileyo uxinzelelo lwamehlo. Ngoko ke, ukunyuka kwe- cornea , kufuneka ukuba kuqwalaselwa xa kuthatha isigqibo sokuba umngcipheko wokuphuhlisa i-glaucoma.
Ngesinye isikhathi, i-corneal thickness yayicinga ukuba yinto efanayo kuzo zonke izigulane. Uphando olutshanje, nangona kunjalo, lubonisa ukuba ubukhulu be-corneal buyahlukahluka kakhulu kumntu kumntu.
Uxinzelelo ngaphakathi kweso lilinganiswa kwisixhobo esibizwa ngokuba yi " tonometer ." Ukuchaneka kokufunda uxinzelelo, nangona kunjalo, kunokukhohlisa. Ucwaningo luye lwabonisa ukuba i-cornea elincinci lingabangela ukulinganisa okuphantsi kokunciphisa, ngelixa i-cornea ekhudlwana ingabangela umlinganiselo ophezulu. Oku kubakho ukufundwa okungafunekiyo kubalulekile, kuba umntu onengcinezelo ebonakalayo phantsi (ebonisa ukuba unobungozi obuncinane bokuphuhlisa i-glaucoma) inokuba yingozi kakhulu kwaye unesifo sokonyango. Inkxalabo yeliso lokwenene lomntu libonakala liphantsi nje ngenxa yobuncwane be-cornea.
Oogqirha ngoku baquka ukulinganisa kobunzima be-cornea, eyaziwa njenge-pachymetry, njengenxalenye yokuhlolwa kwe-glaucoma. Nangona abaphandi bengavumelani nokulungiswa ngqo okumele kusetyenziswe, oogqirha ngoku banengcamango ngokuqhelekileyo yintoni ecinga ukuba ngaba isiguli sinomzimba omncinci okanye obunzima.
I-Pachymetry ibe ngumvavanyo oqhelekileyo wokuhlola uvavanyo ekuncedeni ukuxilongwa kwe-glaucoma.
Ukungadibanisi imbambano eninzi, kodwa ezinye iingcaphephe zibonisa ukuba ubukhulu be-corneal bunokuba nomthelela ekufundeni ukunyamezela kwamehlo esiyilinganisayo, kodwa ukuqina kwe-corneal, ngokwalo, kunokuba ngumngcipheko ozimeleyo wokuqhubela phambili kwe-glaucoma. Oku kubonakala kudidekile. Nangona kunjalo, iifundo zikhangele ingozi ye glaucoma kunye nobukhulu bomntu othile, kungekhona okokuba, ukunyanzeliswa kweempembelelo kukuthintela ukufunda ngokunyanzela. Ezi zifundo zibonise ukuba ukuhla kwe-40 microns ye-corneal thickness ilingana nama-70 ekhulwini amathuba okuphuhlisa i-glaucoma. Oku kubonisa ukuba i-cornea ekhudlwana ngokwaneleyo, ngokwalo, ukulungisa umngcipheko ohambelana nexinzelelo lemehlo ephakamileyo.
Ngenye indlela, umntu olinganisa i-30 mm Hg kunye ne-corneal thickness ye-600 microns inesiqingatha somngcipheko wokuphuhlisa i-glaucoma kunomntu onengcinezelo yezilingo ezingama-20 mm Hg kunye ne-corneal thickness of 500 microns. Ukuyibeka kwimigangatho elula, i-cornea inokuba yinto ebalulekileyo into ekuqwalasela ukuba ingcinezelo yeso isoqobo.
Enye into esaziyo ngokuqinisekileyo, kukuba i-pachymetery, imilinganiselo ye-corneal thickness, imilinganiselo ebalulekileyo yokuqokelela xa kuhlolwa umngcipheko wabantu be-glaucoma.
> Umthombo:
> I-Ophthalmic News kunye neNethiwekhi yezeMfundo, "iNtlupheko yeGlaucoma yeNdlu: I-Corneal Pachymetry." I-American Academy ye-Ophthalmology (inkqubo ye-intanethi) ngoMeyi 2006.