A New Slit Lamp-Based Technique for Anterior Chamber Angle Estimation

作者：Gispets Joan^*; Cardona Genis; Tomas Nuria; Fuste Celia; Binns Alison; Fortes Miguel A

来源：Optometry and Vision Science, 2014, 91(6): 668-675.

DOI：10.1097/OPX.0000000000000254

• angle closure
• anterior chamber angle
• gonioscopy
• limbal chamber depth
• narrow angle glaucoma

Purpose. To design and test a new noninvasive method for anterior chamber angle (ACA) estimation based on the slit lamp that is accessible to all eye-care professionals. %26lt;br%26gt;Methods. A new technique (slit lamp anterior chamber estimation [SLACE]) that aims to overcome some of the limitations of the van Herick procedure was designed. The technique, which only requires a slit lamp, was applied to estimate the ACA of 50 participants (100 eyes) using two different slit lamp models, and results were compared with gonioscopy as the clinical standard. %26lt;br%26gt;Results. The Spearman nonparametric correlation between ACA values as determined by gonioscopy and SLACE were 0.81 (p %26lt; 0.001) and 0.79 (p %26lt; 0.001) for each slit lamp. Sensitivity values of 100 and 87.5% and specificity values of 75 and 81.2%, depending on the slit lamp used, were obtained for the SLACE technique as compared with gonioscopy (Spaeth classification). %26lt;br%26gt;Conclusions. The SLACE technique, when compared with gonioscopy, displayed good accuracy in the detection of narrow angles, and it may be useful for eye-care clinicians without access to expensive alternative equipment or those who cannot perform gonioscopy because of legal constraints regarding the use of diagnostic drugs.

• 出版日期2014-6