A photometric study of the effect of pupil dilatation on Nd:YAG laser iridotomy area. Issue 11 (November 1992)

• Record Type: Journal Article
• Authors: Fleck, B W; Fairley, E; Wright, E
• Is Part Of: British journal of ophthalmology. Volume 76:Issue 11(1992)
• Page Start: 678
• Page End: 680
• Publication Date: 1992-11
• Subjects: Ophthalmology -- Periodicals; 617.7
• DOI: 10.1136/bjo.76.11.678
• Languages: English
• ISSNs: 0007-1161

Abstract

Abstract : A photometric study of the effect of pupil dilatation on Nd:YAG laser iridotomy area was performed in 21 eyes of 21 patients. The iridotomy area was 0.075 (0.055) mm-2 (mean (SD)) before pupil dilatation and 0.073 (0.070) mm-2 after pupil dilatation (t test NS). Iridotomy area after pupil dilatation correlated with iridotomy area before pupil dilatation (r = 0.815, p < 0.01) but did not significantly correlate with measures of iridotomy shape or position, or with changed iris area following pupil dilatation. Two iridotomies became reduced to less than 20% of their initial area following pupil dilatation. Our findings suggest that the only effective method of avoiding development of unacceptably small iridotomy area after pupil dilatation is to create a sufficiently large iridotomy at the time of initial laser surgery.