Gonioscopy and artefacts.

Age and Sex Variation in Angle Findings Among Normal Chinese Subjects

“…Another is that the act of applying a gonioscope to the ocular surface, no matter how carefully, causes some distortion to the in vivo anatomy. [15][16][17] As has been published previously, 18 angle findings were correlated with anterior chamber depth. Although correlation was close to 0.7 for all 3 angle assessment techniques, this may be an underestimate of the strength of the association because anterior chamber depth was assessed several years before the angle examination.…”

Angle Assessment by EyeCam, Goniophotography, and Gonioscopy

“…Documentation of gonioscopic findings is often poor, as images or photographic records are not routinely taken in clinical practice. 1 A recent chart review of insured patients diagnosed with glaucoma in the United States found that routine gonioscopic examination was not standardized and infrequently performed. 2 In this context, the availability of simple photographic techniques to document angle findings would be an appealing option in clinical practice, especially if imaging provided clinically useful information about the risk of angle closure and can be used for documentation of longitudinal changes.…”

Angle closure and angle‐closure glaucoma: what we are doing now and what we will be doing in the future

“…The main limitation of gonioscopy is that it is observer dependent and subjective, with only moderate agreement reported among observers 19 . Gonioscopic findings may also vary with the use of different gonioscopic lenses, and with changing ambient light conditions, from pressure on the gonioscopic lens or mechanical compression of the eye 20 …”