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  • Title: Anterior chamber depth and complications during cataract surgery in eyes with pseudoexfoliation syndrome.
    Author: Küchle M, Viestenz A, Martus P, Händel A, Jünemann A, Naumann GO.
    Journal: Am J Ophthalmol; 2000 Mar; 129(3):281-5. PubMed ID: 10704540.
    Abstract:
    PURPOSE: To look for associations of preoperative A-scan ultrasound ocular dimensions with complications during phacoemulsification in eyes with pseudoexfoliation. METHODS: A total of 174 eyes with pseudoexfoliation of 135 patients undergoing planned cataract surgery were included in a prognostic study based on the review of a clinical database. Preoperatively, A-scan ultrasound examination with measurement of anterior chamber depth, lens thickness, and total axial length was performed. Phacoemulsification with implantation of a posterior chamber intraocular lens was performed by a total of five surgeons. Intraoperative complications (zonular dialysis and/or vitreous loss) were correlated with preoperative findings including ultrasound dimensions. Multivariate logistic regression analysis with a generalized estimating equations method was used for statistical analysis. RESULTS: Intraoperative complications occurred in 12 eyes (6.9%) of 11 patients. The anterior chamber was significantly shallower in eyes with than in eyes without complications (mean, 2.36 +/- 0.44 mm vs 2.74 +/- 0.52 mm; P =.013). The differences in lens thickness (4.93 +/- 0.55 mm vs 4.72 +/- 0.54 mm; P =.30) and the differences in axial length (22.92 +/- 1.09 mm vs 23.66 +/- 1.36 mm; P =.07) between the two groups did not reach statistical significance. In eyes with pseudoexfoliation, an anterior chamber depth of less than 2.5 mm was associated with a risk of 13.4% for intraoperative complications compared with an overall incidence of intraoperative complications of 6.9% and an incidence of 2.8% for an anterior chamber depth of 2.5 mm or more. CONCLUSIONS: A small anterior chamber depth may indicate zonular instability in eyes with pseudoexfoliation syndrome and should alert the cataract surgeon to the possibility of intraoperative complications.
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