Vitreous incarceration after ranibizumab injection: an ultrasound biomicroscopy study.

BACKGROUND AND

OBJECTIVE

The aim of the study was to evaluate vitreous incarceration at the injection site using ultrasound biomicroscopy (UBM) after intravitreal injection of ranibizumab.

PATIENTS AND

METHODS

The study included 39 eyes of 34 patients who underwent intravitreal injection of 0.05 mL of ranibizumab. UBM (HiScan; Optikon, Rome, Italy) with a 50 MHz probe was performed 1 day after surgery to determine the existence of vitreous incarceration at the injection site.

RESULTS

The mean patient age was 59.7 (± 10.1) years, and 58.9% were female. Vitreous incarceration into the pars plana site was detected in six eyes (15.3%) the day after intravitreal injection.

CONCLUSION

Vitreous incarceration at the injection site after intravitreal injection is thought to lead to a higher risk for complications such as infection, retinal breaks, retinal detachment, vitreous hemorrhage, and fibrovascular proliferation at the injection site. To understand the clinical importance of vitreous incarceration, further long-term prospective studies are necessary.