A topical corneal anaesthetic, generally used in 0.4% solution. It may be used to carry out tonometry, gonioscopy, to remove a foreign body, etc. Syn. benoxinate hydrochloride. When used for applanation tonometry it is combined with 0.25% sodium fluorescein.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann