Objective: To observe the location of posterior chamber intraocular lenses (PCIOL) after secondary transscleral fixation, to evaluate its impact on the structures of anterior segment and its correlation with visual outcome.
Methods: It was a retrospective case series, included 32 aphakic patients (32 eyes) with secondary transscleral fixation of PCIOL. Postoperatively, the accurate position of the lens and their relationship with adjacent structures were observed by ultrasound biomicroscopy (UBM). The follow-up time period ranged from 6 to 18 months.
Results: Best-corrected visual acuity were improved postoperatively in 30 eyes while the other 2 eyes remained unchanged. No tilt or decentration of the lens was demonstrated by the slit lamp microscopy. While using UBM, optic tilt was found in 9 eyes and decentration in 2 eyes. The decentration and tilt of the lens correlated with visual outcome and was statistically significant (X2 = 4.36, P < 0.05). In 12 eyes (37.5%), both haptics were located in the sulcus. In 20 eyes (62.5%), one haptic was located in the sulcus and the other one was in the back of the iris, pars plica (43.8%), pars plana (9.4%) or vitreous cavity (6.3%). The different haptic locations were no correlated with visual outcome ( X2 = 0.26, P > 0.05).
Conclusions: The current suture technique for transscleral fixated PCIOLs can not ensure the proper anatomical outcome. The decentration and tilt of the lens correlate with the postoperative best corrected visual acuity. In our study, we could not find the correlation between the haptic location and visual outcome.