Gonioscopy

Gonioscopy is an examination method used to examine the aqueous humour angle more closely. If the chamber angle is particularly narrow or blocked by inflammatory processes, the aqueous humour can no longer drain properly. This results in an increase in intraocular pressure. A gonioscopy should therefore be performed in the case of certain underlying diseases and if a narrow aqueous angle is suspected.

What is the chamber angle?
The chamber angle is the drainage area for the aqueous humour inside the eye. It is limited in its width - to the front by the posterior surface of the cornea and to the back by the anterior surface of the iris.

Performing the gonioscopy

For gonioscopy, the surface of the eye must be anaesthetised with eye drops. A small examination lens - the gonioscope - is then placed on the surface of the eye. Depending on whether there are changes to the angle of the chamber or not, further treatment must then be planned: If the chamber angle is narrow, a YAG iridotomy can be performed. This involves using a laser to create a small circular opening at the edge of the iris. This allows the aqueous humour to circulate through this opening. If you have a narrow chamber angle and a cataract, cataract surgery should be performed.