The advent of digital gonioscopy

Bill Harvey takes a look at a new slit-lamp apparatus offering excellent anterior images and measurement capability

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Assessment of the anterior chamber is an important part of the eye examination but does present the optometrist with some problems. The curvature of the cornea means that light from the filtration angle itself hits the cornea at greater than the critical angle, meaning that it is not visible through direct viewing conditions without the use of a contact viewing lens. This technique is gonioscopy.