Aim: In this study we investigated the changes in anterior segment morphology in
pseudophakia patients that underwent ultrasound biomicroscopy (UBM) after pars
plana vitrectomy (PPV) operation without use of tamponade. Method: Pseudophakic
patients who undergo PPV were enrolled in this prospective study between October
2012 and April 2015. Study included patients in whom intraocular tamponade
was not used during PPV operation. UBM measurements were performed both before
and 10 days after the operation. Anterior chamber depth (ACD) was measured
using axial images of anterior segment. Trabecular meshwork-iris angle (TIA), ciliary
body thickness (CBT), sclera thickness (ST), trabecular meshwork-ciliary process
distance (T-CPD), iris-ciliary processes distance (I-CPD), and iris thickness (IT)
were measured at temporal quadrant based on radial section images of the angle.
Values measured before and after the operation were statistically compared with
each other. Results: This study included 30 patients (18 females, 12 males) that underwent
an operation ultrasound biomicroscopy (UBM) after pars plana vitrectomy
(PPV) operation without use of tamponade. Mean age was 69.6 ± 9.1 (55 - 85) years.
Eighteen operations occurred on the left eye whereas twelve operations occurred on
the right eye. CBT1, CBT2, CBT Max, T-CPD, and I-CPD were significantly decreased
after operation when compared with the values of baseline (before) (p =
0.018, p = 0.012, p = 0.001, p = 0.033, p = 0.015, respectively). Other evaluated parameters
did not show statistically significant changes after the operation (p > 0.05). Discussion: PPV results in significant changes in ciliary body morphology together
with changes in anterior segment parameters in pseudophakic cases.
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