Electroretinografi

I-Electroretinografi luvavanyo lokulinganisa impendulo yombane yeeseli ezibonisa ukukhanya kweliso, ezibizwa ngokuba ziintonga kunye neekhowuni. Ezi seli ziyinxalenye yeretina (ngasemva iliso).

Ngelixa uhleli kwindawo yokuhlala, umboneleli wezempilo ubeka amathontsi abuthathaka emehlweni akho, ngenxa yoko awuzukukhathazeka xa kuvavanywa. Amehlo akho ahlala evulekile ngesixhobo esincinci esibizwa ngokuba yi-speculum. Inzwa yombane (i-electrode) ibekwe kwiliso ngalinye.

I-electrode ilinganisa imisebenzi yombane yeretina ekuphenduleni ukukhanya. Ukukhanya okukhanyayo, kwaye impendulo yombane ihamba isuka kwi-electrode iye kwiscreen esifana nomabonwakude, apho inokujongwa kwaye irekhodwe khona. Indlela eqhelekileyo yokuphendula inamaza abizwa ngokuba ngu-A no-B.

Umboneleli uya kuthatha ufundo kwigumbi lokukhanya eliqhelekileyo kwaye kwakhona ebumnyameni, emva kokuvumela imizuzu engama-20 ukuba ilungelelanise amehlo akho.

Akukho lungiselelo lukhethekileyo luyimfuneko kolu vavanyo.

Iinkqubo ezihlala elisweni lakho zinokuziva ngathi zincinci. Uvavanyo luthatha malunga neyure ukwenza.

Olu vavanyo lwenziwa ukukhangela ukuphazamiseka kweretina. Kukwaluncedo ekumiseleni ukuba ngaba utyando lwasemva ngamehlo luyacetyiswa.

Iziphumo zovavanyo eziqhelekileyo ziya kubonisa ipateni eqhelekileyo A kunye no-B ekuphenduleni isibane ngasinye.

Ezi meko zilandelayo zinokubangela iziphumo ezingaqhelekanga:

• I-Arteriosclerosis enomonakalo kwi-retina
• Ubumfama bobusuku bokuzalwa
• I-retinoschisis yokuzalwa (ukwahlukana kwamanqanaba e-retina)
• Iseli enkulu yegazi
• Amayeza (chloroquine, hydroxychloroquine)
• UMucopolysaccharidosis
• I-Retinal detachment
• I-Rod-cone dystrophy (i-retinitis pigmentosa)
• Umonzakalo
• Ukusilela kweVitamin A.

I-cornea inokufumana ukuqala okwethutyana phezu komhlaba kwi-electrode. Ngaphandle koko, akukho bungozi ngale nkqubo.

Akufanele uthambise amehlo akho kangangeyure emva kovavanyo, kuba oku kunokwenzakalisa inwebu. Umboneleli wakho uya kuthetha nawe malunga neziphumo zovavanyo kwaye zithetha ntoni kuwe.

ERG; Uvavanyo lwe-Electrophysiologic

• Qhagamshelana neelensi electrode elisweni

IBaloh RW, uJen JC. Neuro-ophthalmology. Ku: IGoldman L, iSchafer AI, ii-eds. Amayeza eGoldman-Cecil. Ngomhla wama-26. IPhiladelphia, PA: Elsevier; 2020: isahluko 396.

UMiyake Y, uShinoda K.Ukliniki ye-electrophysiology. Ku: Schachat AP, Sadda SVR, Hinton DR, Wilkinson CP, Wiedemann P, ii-eds. URetina kaRyan. Umhla wesi-6. IPhiladelphia, PA: Elsevier; I-2018: isahluko 10.

UReichel E, uKlein K.Ukubuyisela i-electrophysiology. Ku: Yanoff M, Duker JS, ii-eds. Ophthalmology. Umhla we-5. IPhiladelphia, PA: Elsevier; I-2019: isahluko 6.9.