Triamcinolone-induced cataract in eyes with diabetic macular oedema: 3-year prospective data from a randomized clinical trial
Article first published online: 27 MAY 2010
© 2010 The Authors. Journal compilation © 2010 Royal Australian and New Zealand College of Ophthalmologists
Clinical & Experimental Ophthalmology
Volume 38, Issue 6, pages 605–612, August 2010
How to Cite
Gillies, M. C., Islam, F. M., Larsson, J., Pasadhika, S., Gaston, C., Zhu, M. and Wong, T. Y. (2010), Triamcinolone-induced cataract in eyes with diabetic macular oedema: 3-year prospective data from a randomized clinical trial. Clinical & Experimental Ophthalmology, 38: 605–612. doi: 10.1111/j.1442-9071.2010.02341.x
- Issue published online: 5 AUG 2010
- Article first published online: 27 MAY 2010
- Received 19 August 2009; accepted 12 May 2010.
Vol. 38, Issue 7, 741, Article first published online: 13 OCT 2010
- cataract surgery;
- IVTA injection;
- macular oedema;
- visual acuity
Purpose: To describe the 3-year risk of cataract after intravitreal triamcinolone (IVTA) injections for diabetic macular oedema and the outcomes of cataract surgery.
Methods: Prospective data from a randomized clinical trial were analysed. At baseline, 27 phakic eyes with diabetic macular oedema were randomized to receive IVTA and 25 to receive sham injection. After 2 years, initial sham-treated eyes were eligible to receive IVTA as the study became open label for the third year. The cumulative incidence of cataract surgery was the primary outcome of the study. Other outcomes assessed included progression of cataract, best-corrected logarithm of the minimal angle of resolution visual acuity before and after surgery and central macular thickness.
Results: Over the 3 years of the study, 15/27 (56%) phakic eyes in the IVTA treated group underwent cataract surgery as compared with 2/25 (8%) initial sham-treated eyes (P < 0.001). Mean visual acuity 6 months after cataract surgery was better than at entry into the trial. Two (15%) of the eyes in the IVTA-treated group undergoing cataract surgery had a loss of >15 letters. In the IVTA-treated group, 10/15 (67%) eyes that had three or more injections had progression of posterior subcapsular cataract by ≥2 grades as compared with only 2/12 (17%) eyes that had fewer than three injections (P = 0.009).
Conclusions: Over half of the eyes receiving IVTA injections for diabetic macular oedema required cataract surgery within 3 years. In eyes with three or more IVTA injections, two-thirds had progression of posterior subcapsular cataract. Visual outcomes after cataract surgery were generally good, although a small proportion of eyes lost greater than 15 letters over the course of the study.