I-Pachymetry iyivivinyo elilula, elingenabuhlungu elisheshayo ngokulinganisa ubukhulu be-cornea.
Kungani Ukulinganisa Ukwehla Kwama-Corneal?
Ukuqina kwe-corneal njengoba kulinganiswa nge-pachymetry kubalulekile esimweni sokunakekelwa kweso ngezizathu eziningana.
I-pachymetry ingatshela odokotela uma i-cornea ivimba. Izimo zezokwelapha ezifana ne-Fuch's Dystrophy zingakhuphula uketshezi ku-cornea futhi zenze ukwanda kwe-thickness jikelele.
Ngisho nokugqoka ama-lens angabangela ukuhlushwa okukhulu kwe-corneal. Lokhu kungase kube nzima ukubona ngaphansi kwe-microscope. Noma kunjalo, i-pachymetry izobonisa ukwanda okuqondile kokuqina.
Ubuningi be-corneal bubaluleke kakhulu ezinkambisweni zokuhlinza zokubhuka ezifana ne- LASIK . Ulwazi lwe-corneal thickness kubalulekile ukucacisa ukuthi umuntu ungumuntu obhekene nokulungiswa kombono we-laser. Ngoba ingxenye yenqubo ihlanganisa ukukhipha izicubu ezizoshiya i-corneal thinner, kubalulekile ukwazi kahle ukuthi kuzosala kangakanani. Abanye abantu bangase babe ne-cornea elula kakhulu kunejwayelekile. Akubangeli izinkinga noma izifo, kodwa kungabhekisela ekulahlekelweni kwembono okubuhlungu uma inqubo yokucubungula iyenziwa kumuntu ogama lakhe elincane kakhulu.
I-pachymetry nayo ibalulekile ekunakekeleni kwe- glaucoma . I-glaucoma yisifo lapho ukucindezeleka kweso (ukucindezelwa kwe-intraocular) kungakhuphuka.
Ukucindezeleka kwamehlo okwehlisiwe kungabangela ukulahlekelwa kwe-nerve fiber ku-retina okungase kubangele ukuphuphuthekisa noma ukunciphisa umbono. Izindlela eziningi zihlanganisa indlela yokulinganisa ukucindezeleka kweso lapho insimbi ithinta i-cornea. Abacwaningi bathola ukuthi ukuqina kwe-corneal kungahluka kancane kubantu. Ukuqina kwe-corneal kungathinta ukufundwa kwangempela kwenani lokucindezela emehlweni.
Ngaphezu kwalokho, ukuchithwa kwe-corneal thickness njengesikhombisi esizimele se-glaucoma Ingozi ye-Ocular Hypertensive Treatment Study (OHTS) yenza i-corneal pachymetry ingxenye ebalulekile yokuhlolwa kwe-glaucoma.
I-pachymetry yenziwe kanjani?
I-pachymetry ingenziwa ngezindlela ezimbili, ngamasu we-ultrasound noma ngamasu optical.
I-Pachymetry ye-ultrasound: I- ultrayound pachymetry njengoba igama libonisa, isebenzisa izimiso ze-ultrasound ukukala ubukhulu be-cornea. Le ndlela isebenzisa amadivaysi asebenza ngendlela ephumelelayo futhi ephathekayo. Impendulo enkulu kakhulu yokulinganisa ukuqina kwe-corneal nge-ultrasound yukuthi iphenyo elisetshenziselwa ukuthinta i-cornea kufanele ibeke kahle ngokuphelele. Noma yikuphi ukuhamba okuncane nokufunda kungase kungabi nalungile. Amanye ama-pachymeters e-ultrasound aklanyelwe kakhulu ukuhlolwa kwe-glaucoma futhi afaka phakathi kubakhiqizi bokubala be-risk factor.
I-Pachymetry ebonakalayo : I- pachymeters ebonakalayo ihluka ngokuklama. Amanye ama-pachymeter optical aklanyelwe ukuba afakwe kwi-biomicroscope ukuthi odokotela bamaziso basebenzise ngokuthi isibani sokwehlukanisa. Amanye amadivaysi angakwazi ukukala i-pachymetry usebenzisa i-microscopy ecacile. Le divayisi ayihlangani ngqo ne-cornea. Uhlobo olulodwa lwe-pachymetry ebonakalayo olutholakala ekuthandweni yi-OCT noma i- optical coherence tomography pachymetry.
I-OCT ekymetry nayo ayithinti i-cornea ukufeza izilinganiso. I-OCT isebenzisa isimiso esibizwa ngokuthi i-interferometry ye-optical. Enye indlela esekelwe ekusebenziseni into ebizwa ngokuthi i-Scheimpglug imaging inhle kakhulu ekutholeni izilinganiso eziningi ze-peripheral of thickness corneal ngaphezu kwe-thickness corneal thickness futhi uthole lezi zilinganiso ngokushesha kakhulu. Okukodwa kwe-pachymetry ye-optical ukuthi izinkampani zomshuwalense ngokuvamile zikhokha i-ultrasound pachymetry futhi hhayi njalo nge-pachymetry ebonakalayo ngakho kungenzeka ukuthi udokotela wakho angakucela ukuthi ukhokhe.