Evaluation of Nasal and Temporal Anterior Chamber Angle with Four Different Techniques

Fredrik P. Källmark, Mezghan Sakhi

Unit of Optometry, Section of Ophthalmology and Vision, Department of Clinical Neurosience, Karolinska Instetutet, Stockholm, Sweden.

DOI: 10.4236/ijcm.2013.412095                

Abstract

Background: Anterior chamber angle (ACA) can be measured by many different techniques. In order for a technique to be a part of the routine eye examination, it has to be quick and easy in good agreement with gonioscopy both nasally and temporally. Aim: To investigate variation in ACA measurement between gonioscopy, van Herick technique, anterior segment optical coherence tomography (AS-OCT) and Sirius Scheimpflug-Camera both nasally and temporally. Method: The ACA of 50 eyes of 25 healthy subjects was measured with gonioscopy, van Herick technique, AS-OCT and Sirius Scheimpflug-Camera. The angle was measured both nasally and temporally. Results: No statistically significant difference could be found between gonioscopy, van Herick technique and AS-OCT either nasally or temporally. The Sirius Scheimpflug-Camera on the other hand showed statistically significant difference to gonioscopy (p < 0.0001), van Herick technique (p < 0.0001) and AS-OCT (p < 0.0001) both nasally (p = 0.03, p = 0.001, p < 0.0001) and temporally (p = 0.0002, p = 0.001, p < 0.0001). Conclusion: This study showed good agreement between three of the four techniques. ACA measurements obtained by the Sirius Scheimpflug-Camera should therefore not be considered interchangeable with those obtained by the remaining three methods.

Keywords

Anterior Chamber Angle (ACA); Gonioscopy; Van Herick Technique; Sirius Scheimpflug Camera; AS-OCT; Angle Closure Glaucoma

Conflicts of Interest

The authors declare no conflicts of interest.

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