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Abstract #12416 Published in IGR 7-2
Effects of combined cataract surgery and trabeculectomy with mitomycin C on ocular dimensions
Law SK; Mansury AM; Vasudev D; Caprioli JBritish Journal of Ophthalmology 2005; 89: 1021-1025
AIMS: To characterise changes in ocular dimensions after combined cataract operation and trabeculectomy with mitomycin C using separate incisions (combined operation). METHODS: 24 consecutive eyes that had combined operation and 16 eyes that had cataract operation alone were enrolled. The axial lengths before and after operations were determined with non-contact optical coherence biometry. The intraocular pressures (IOP), axial lengths, corneal curvatures, and the expected and observed refractive errors before and after operations were compared. RESULTS: After a combined operation, mean IOP was significantly reduced from 16.6 (SD 5.8) mmHg to 10.9 (4.1) mmHg (p < 0.00001), and mean axial length was significantly shortened from 24.10 (0.98) mm to 23.98 (0.96) mm (p < 0.00001). The mean axial length reduction after combined operation (117 (57) μm) was significantly larger than the reduction after cataract operation alone (75 (38) μm, p < 0.02), and correlated significantly with the postoperative IOP (p < 0.002). There was a mean with the rule surgically induced corneal astigmatism of 0.44 (0.83) dioptre by vector analysis, and a significant increase of mean keratometry reading of 0.23 (0.46) dioptre after a combined operation. However, there was no significant difference between the expected and observed refractive errors. CONCLUSIONS: Despite an alteration of the axial length and corneal curvature, the refractive outcome after a combined operation did not differ significantly from the predicted refraction.
Dr. S.K. Law, 100 Stein Plaza #2-235, Jules Stein Eye Institute, Los Angeles, CA 90095, USA. law@jsei.ucla.edu
Classification:
12.14.3 Phacoemulsification (Part of: 12 Surgical treatment > 12.14 Combined cataract extraction and glaucoma surgery)
