ocular biometric changes after trabeculectomy; a review article

trabeculectomy is the most common procedure performed in glaucoma patients to reduce intraocular pressure for a long-time period. this intervention can cause alterations in axial length (0.1-0.9 mm), anterior chamber depth (0.11±0.22 mm), and keratometry readings (1.07±1.14 diopter). these changes may linger for more than one year and may negatively affect the precision of intraocular lens power calculation for cataract surgery. measures such as using non-contact biometry methods and postponing cataract surgery until the acceptable stability of biometric changes after trabeculectomy is achieved can reduce these calculation errors. in this systematic review, all the relevant articles published in pubmed between 1977 and 2013 were analyzed.