Electrical impedance tomography of the eye: in vitro measurements of the cornea and the lens.
This study was designed to perform multifrequency impedance measurements on the pig's eye. On one hand, impedance of the ocular tissues was measured from 10 kHz to 10 MHz. The aqueous and vitreous humours and the cornea showed no relaxation in this range of frequencies, whereas the lens and its parts (the cortex and the nucleus) did. On the other hand, multifrequency EIT and dynamic imaging were performed on the lens and on the whole eye. Data and images obtained after thermal and chemical injuries are presented and discussed.
Jürgens
I
I
Servei d'Oftalmologia, Hospital de l'Esperanca, Universitat Autònoma de Barcelona, Spain.
Rosell
J
J
Riu
P J
PJ
D000818:Animals; D001082:Aqueous Humor / Q000502:physiology; D003315:Cornea / Q000502:physiology* / Q000503:physiopathology; D065306:Corneal Injuries; D017097:Electric Impedance; D005128:Eye Diseases / Q000175:diagnosis / Q000503:physiopathology; D006801:Humans; D066298:In Vitro Techniques; D007904:Lens Cortex, Crystalline / Q000502:physiology; D007907:Lens Nucleus, Crystalline / Q000502:physiology; D007908:Lens, Crystalline / Q000502:physiology*; D013552:Swine; D014054:Tomography / Q000295:instrumentation / Q000379:methods*; D014822:Vitreous Body / Q000502:physiology