The Effect of Prior Trabeculectomy on Refractive Outcomes of Cataract Surgery

Zhang, Nanfei; Tsai, Patrick; Catoira-Boyle, Yara; Morgan, Linda; Hoop, Joni; Cantor, Louis B.; WuDunn, Darrell

doi:10.1016/j.ajo.2012.11.023

Cited by 39 publications

(25 citation statements)

References 14 publications

(19 reference statements)

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“…However, the IOP was surprisingly increased after cataract surgery in patients with OAG that had undergone a prior trabeculectomy. Other investigators have also observed this result after cataract surgery in patients with OAG that had undergone a prior trabeculectomy . Although the exact mechanism of this IOP increase is not known, postoperative intraocular inflammation is thought to play an important role by causing scleral flap and conjunctival bleb fibrosis …”

Section: Discussionmentioning

confidence: 83%

Effect of trabeculectomy on the accuracy of intraocular lens calculations in patients with open‐angle glaucoma

Bae

Lee

Kim

et al. 2016

Clinical Exper Ophthalmology

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Section: Discussionmentioning

confidence: 83%

Effect of trabeculectomy on the accuracy of intraocular lens calculations in patients with open‐angle glaucoma

Bae

Lee

Kim

et al. 2016

Clinical Exper Ophthalmology

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“…Muallem and colleagues showed that a myopic shift exceeding 1.00 D was more prevalent in eyes undergoing cataract surgery within the first 10 months post‐trabeculectomy. Moreover, in studies of predominantly open angle glaucoma, there was a significant myopic shift (0.36 to 0.66 D, p ≤ 0.01), which implies that these eyes may be more sensitive to IOP changes . Additionally, a lower IOP before phacoemulsification and a higher IOP increase after phacoemulsification correlate with the extent of final refractive error .…”

Section: Refractive Surprises After Cataract Surgery In Trabeculectommentioning

confidence: 97%

“…Several studies have investigated the refractive outcome of post‐trabeculectomy cataract extraction. While some demonstrated a myopic shift, others revealed a reasonably predictable refractive outcome.…”

Section: Refractive Surprises After Cataract Surgery In Trabeculectommentioning

confidence: 99%

“…Moreover, in studies of predominantly open angle glaucoma, there was a significant myopic shift (0.36 to 0.66 D, p ≤ 0.01), which implies that these eyes may be more sensitive to IOP changes . Additionally, a lower IOP before phacoemulsification and a higher IOP increase after phacoemulsification correlate with the extent of final refractive error . This may be due to the effect of contact biometric probe (that is used in all older studies), which could produce more IOL calculation error and consequently, more final refractive error.…”

Section: Refractive Surprises After Cataract Surgery In Trabeculectommentioning

confidence: 99%

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Post‐trabeculectomy ocular biometric changes

Pakravan

Alvani

Esfandiari

et al. 2017

Clinical and Experimental Optometry

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Trabeculectomy is the most common surgical procedure for the management of glaucoma, which may significantly influence ocular biometry. Axial length and anterior chamber depth tend to decrease, while crystalline lens and choroidal thickness increase post-operatively. An increase in with-the-rule astigmatism is also observed after the procedure. Such biometric changes affect intraocular lens power calculation even years after the procedure. Non-contact biometric methods and postponing cataract surgery after trabeculectomy could reduce calculation errors associated with surgically induced alterations in ocular biometrics.

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“…One study compared the eyes that underwent phacoemulsification at least 3 months after trabeculectomy with the eyes that did not undergo glaucoma surgery and reported that the change in IOP is negatively correlated with refractive surprise; a correlation between lower postoperative IOP or greater IOP reduction and the amount of axial length reduction was expected [14]. In addition, a recent study has revealed that refractive outcome is inferior in combined versus subsequent trabeculectomy [15].…”

Section: Introductionmentioning

confidence: 99%

Intraocular Pressure, Axial Length, and Refractive Changes after Phacoemulsification and Trabeculectomy for Open-Angle Glaucoma

Popa-Cherecheanu

Iancu

Schmetterer

et al. 2017

Journal of Ophthalmology

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Purpose To compare changes in intraocular pressure (IOP), axial eye length (AEL), and refractive outcome in primary open-angle glaucoma patients undergoing cataract surgery and trabeculectomy in dependence of the sequence of surgeries. Materials and Methods We retrospectively analysed 48 eyes. The changes in refraction, intraocular pressure, and axial eye length were analysed after surgery. In group A (21 subjects), phacoemulsification was performed before trabeculectomy, and in group B (27 subjects), trabeculectomy was performed before phacoemulsification with a minimum time span between interventions of 6 months. Results The reduction in IOP and the decrease in AEL after trabeculectomy were significant after 6 and 12 months postsurgery (p < 0.001 each). The decrease in AEL was 0.42 ± 0.11% at 6 months after surgery and 0.40 ± 0.13% after 12 months from surgery; this decrease in AEL was comparable between the groups. The refractive outcome was significantly different between the groups (group A: 0.35 ± 0.75 dpt, group B: −0.05 ± 0.36 dpt, p = 0.018); in group A, trabeculectomy caused a hyperopic shift of 0.34 ± 0.44 dpt (p = 0.002) at 12 months postsurgery. Conclusion IOP reduction after trabeculectomy causes AEL shortening. The effect on refractive outcome depends on the sequence of surgeries. Better refractive outcome is achieved if phacoemulsification is performed after trabeculectomy.

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The Effect of Prior Trabeculectomy on Refractive Outcomes of Cataract Surgery

Cited by 39 publications

References 14 publications

Effect of trabeculectomy on the accuracy of intraocular lens calculations in patients with open‐angle glaucoma

Effect of trabeculectomy on the accuracy of intraocular lens calculations in patients with open‐angle glaucoma

Post‐trabeculectomy ocular biometric changes

Intraocular Pressure, Axial Length, and Refractive Changes after Phacoemulsification and Trabeculectomy for Open-Angle Glaucoma

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