Clinical Techniques
Gonioscopy
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- Angle is directly visualised through the contact lens
- Examples
- Koeppe
- Richardson
- Barkan
- Wurst
- Swan-Jacob
Indirect
- Light rays are reflected by a mirror in the contact lens
- Examples
- Goldmann
- Zeiss
- Posner
- Sussman
- Scleral-type (Goldmann):
- Larger
- Require coupling solution
- Better stability and eyelid control
- Compression will narrow angle by pushing on sclera
- Corneal-type (Zeiss, Sussman):
- Smaller
- No coupling solution needed
Facilitates dynamic indentation gonioscopy: can discriminate appositional from synechial angle closure
- Compression will open angle by pushing aqueous in