I-Pachymetry yilingo olulula, olungenabuhlungu olukhawuleza lilinganisa ubukhulu be-cornea.
Kutheni Ukulinganisa Ubunzima beCorneal?
Ubungakanani be-Corneal njengoko bukulinganiswa yi-pachymetry kubalulekile kwisebe lokukhathalela amehlo ngenxa yezizathu ezininzi.
I-Pachymetry inokuxelela oogqirha ukuba i-cornea ivuvuka. Izimo zonyango ezifana ne-Fuch's Dystrophy zinokunyusa uketshezi kwi-cornea kwaye kubangele ukwanda kwenyani.
Kuye ukugqoka ii-lens zidibanisa ngamanye amaxesha kubangela ukukhukhumeza okukhulu kwe-corneal. Oku kunzima ukubona phantsi kwe-microscope. Nangona kunjalo, i-pachymetry iya kubonisa ukunyuka okucacileyo kobunzima.
I-Corneal thickness ibaluleke kakhulu kwiinkqubo zokurhoxisa i-refractive ezifana ne- LASIK . Ulwazi lobunzima be-corneal lubalulekile ukuchonga ukuba umntu ungumviwa wokulungiswa kombono we-laser. Ngenxa yokuba inxalenye yenkqubo iquka ukususa izicubu eziya kushiya i-corneal thinner, kubalulekile ukwazi ngokuthe ngqo ukuba kusele kangakanani. Abanye abantu banokuba ne-cornea elula kakhulu kuneyona evamile. Ayibangeli iingxaki okanye izifo, kodwa inokuphawula ukulahleka kombono wokulahleka xa inkqubo yenkohlakalo iqhutyelwa kumntu ogqithisekayo kakhulu.
I-Pachymetry nayo ibalulekile ekunakekeleni i- glaucoma . I-Glaucoma isifo apho uxinzelelo lwamehlo (uxinzelelo lwe-intraocular) lunokuphakanyiswa.
Ukunyamezela kwamehlo okuphakanyisiweyo kungabangela ukulahlekelwa kwe-nerve fiber kwi-retina engabangela ukuphosakeka okanye ukuphuka kombono. Zininzi iindlela zibandakanya indlela yokulinganisa ixinzelelo lamehlo apho isixhobo sithinta i-cornea. Abaphengululi bafumene ukuba ubunzima be-corneal bunokuhluka kancinci kubemi. Ubungakanani be-corneal bunokuchaphazela ukufundwa kwangempela kwemali yengcinezelo kwiso.
Ukongezelela, ukuchongwa kwe-central corneal thickness njengempawu ezizimeleyo yengozi ye-glaucoma nge-Ocular Hypertensive Treatment Study (OHTS) yenze i-corneal pachymetry ibalulekileyo ebalulekileyo yokuhlolwa kwe-glaucoma.
I-pachymetry eyenziwe njani?
I-Pachymetry ingenziwa ngeendlela ezimbini, ngeendlela zobugcisa okanye ngeendlela zobugcisa.
I-Pachymetry ye-ultrasound: I- ultrasound pachymetry njengoko igama libonisa, isebenzisa imigaqo ye-ultrasound ukulinganisa ubukhulu be-cornea. Le ndlela isebenzisa izixhobo ezichanekileyo kunye neziphathekayo. Ingxaki enkulu yokulinganisa i-corneal thickness yi-ultrasound kukuba iprobe esebenzayo ekuthinteni i-cornea ifanele ibe yindawo epheleleyo. Naluphi na ukufuduka kancinci kunye nokufunda akunako ukuchaneka. Ezinye i-ultrayound pachymeters zenzelwe ngakumbi ukuvavanya kwe-glaucoma kwaye ziquka i-calculator factor factor calculators.
I-Pachymetry ye-Optical: Ama-pachymeters asebenzayo ahluka ngoyilo. Ezinye i-pachymeters ezibonakalayo zenzelwe ukunyuka kwi-biomicroscope ukuba oogqirha beziliso basebenzisa igama elibizwa ngokuba sisibane lesibane. Ezinye iifayile zinokulinganisa i-pachymetry ngokusebenzisa i-microscopy ecacileyo. Le fowuni ayifaki ukudibanisa ngqo kunye ne-cornea. Olunye uhlobo lwe-pachymetry ye-optical efunyenwe ekuthandeni yi-OCT okanye i- optical coherence tomography pachymetry.
I-OCT kwi-acymetry ayichukumisi i-cornea ukufezekisa imilinganiselo. I-OCT isebenzisa umgaqo obizwa ngokuba yi-interferometry ye-optical. Enye indlela esekelwe ekusebenziseni into ebizwa ngokuba yi-Scheimpglug imaging iyinto enhle kakhulu ekufumaneni imilinganiselo ye-pipipali ye-corneal thickness ngaphezu kwe-central corneal thickness kwaye ufumane le milinganiselo ngokukhawuleza. Elinye icala le-pachymetry ebonakalayo kukuba iinkampani zomshuwalense zihlawula ngokuqhelekileyo i-ultrasound pachymetry kwaye akusoloko i-pachymetry ebonakalayo ngoko kwenzeka ukuba ugqirha wakho angakucela ukuba uhlawule.