A new speculum electrode for electroretinography.
A Storz model E4110 infant speculum was modified to record electroretinograms (ERGs) from anesthetized rabbits. The electrode combines the advantage of a corneal contact lens electrode (with blepharostat) without its major disadvantage, namely: corneal abrasion. Addition of i.v. tubings glued to both arms of the speculum allows for constant wetting of the eyeball with 0.9% NaCl. The latter not only prevents the eye (and cornea) from drying, but also favors the recording of reproducible ERGs with a noise level comparable to ERGs recorded with a corneal contact lens electrode.
Lachapelle
P
P
Dept. of Ophthalmology, McGill University, Montreal Children's Hospital, Québec, Canada.
Blain
L
L
D000818:Animals; D003261:Contact Lenses; D003315:Cornea / Q000502:physiology*; D004566:Electrodes; D004596:Electroretinography / Q000295:instrumentation*; D004864:Equipment and Supplies; D008564:Membrane Potentials; D011817:Rabbits