The Use of Special Tests in Narrow-Angled Eyes

Surgical iridectomy carried significant risk, and prior to performing iridectomy a high degree of certainty was required as to the likelihood of angle closure in any given eye, necessitating special tests as to that possibility. The advent of laser iridectomy, with its favorable risk/benefit considerations, resulted in a clinical situation in which additional special tests are only rarely performed in eyes with potentially occludable angles. However, a firm understanding of the principles involved in evaluating these eyes is useful (see Chapter 23). These special tests are detailed not only because of their historical importance, but also because they reinforce the understanding of principles that are critical to appropriately treating such eyes. The beginning resident or student is urged to read and understand the conceptual basis for such tests.