Marcio B Nehemy, MD, PhD (Belo Horizonte, Brazil), Erika P. Magalhães, MD, PhD (Belo Horizonte, Brazil), Patricia G. Nehemy, MD (Belo Horizonte, Brazil), Flávio A. Marigo, MD (Belo Horizonte, Brazil)


To study the ultrasound biomicroscopy (UBM) findings in eyes that have undergone pars plana vitrectomy (PPV) and presented persistent hypotony after surgery and to evaluate different procedures performed with the purpose of increasing the intraocular pressure (IOP).


UBM was performed to study the anterior segment, ciliary body (CB) and the peripheral retina in 44 eyes submitted to PPV that presented persistent ocular hypotony after surgery. One or more of the following procedures were performed with the purpose of increasing the IOP: additional silicone oil injection, intraocular corticosteroids injection and laser trabecular


Forty three eyes (98%) presented CB alterations detected by UBM. There were 4 types of CB changes demonstrated by UBM: tractional CB detachment (TCBD), exudative CB detachment (ECBD), CB hipotrophy (CBH) and CB edema. TCBD was the most frequent finding. Despite of the UBM findings all the procedures resulted in no consistent improvement in IOP.


Almost all of the eyes with chronic hypotony presented CB alterations. None of the procedures performed in this study showed a consistent and helpful effect for this challenging complication of vitrectomy.