Scleral Fixation of Intraocular Lens and Retropupillary Fixation of Iris Claw Lens for Aphakic Eyes

PURPOSE: To compare the efficacy and complications of scleral fixation of posterior chamber intraocular lens (IOL) and retropupillary fixation of iris claw IOL for dislocated IOL or aphakia without sufficient capsular support. METHODS: This retrospective study was comprised of 17 eyes of 16 patients undergoing scleral fixation and 14 eyes of 13 patients undergoing retropupillary fixation from August 2013 to June 2018. Uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), intraocular pressure (IOP), slit lamp examination, corneal topography, refractive indices, corneal curvatures, corneal endothelial cell density, and complications of both groups were examined preoperatively and 1 day, 1 week, 1 month, 2 months, and 6 months postoperatively. RESULTS: Six months after the operation, UCVA and BCVA improved in both groups; however, there were no significant differences between the two groups (UCVA, p = 0.162; BCVA, p = 0.418). IOP was temporarily higher in the scleral fixation group at one day postoperatively (p = 0.023). The mean absolute prediction error was smaller in the retropupillary iris fixation group at 6 months postoperatively (p = 0.034). Postoperative total astigmatism, corneal astigmatism, and corneal endothelial cell density were not significantly different between the two groups. CONCLUSIONS: The retropupillary iris fixation group did not show significant improvement in visual acuity compared with the scleral fixation group. However, the retropupillary iris fixation group provided better mean absolute prediction error and a low risk of postoperative increase in IOP compared with the scleral fixation group. Retropupillary fixation of iris claw IOL is a promising option for scleral fixation of posterior chamber IOL for dislocated IOL or aphakia without sufficient capsular support.

Short-Term Comparison of Surgical Results between One-Haptic and Two-Haptics Transscleral Fixation of Intraocular Lens

PURPOSE: To compare the short-term clinical outcomes of transscleral fixation intraocular lens (IOL) with two haptics or one haptic. METHODS: We retrospectively reviewed the medical records of 26 patients with transscleral fixation of IOL (11 with one-haptic fixation, 15 with two-haptic fixation) except in patients whose visual acuity is not expected to improve due to retinal problems or ocular trauma. We analyzed the manifest refraction, visual acuity, refractive error preoperatively and postoperatively, preoperative IOL decentration, operating time, and postoperative complications. RESULTS: When comparing the two groups preoperatively, the mean lens decentration in the one-haptic group was 2.73 ± 2.88 mm and 4.59 ± 2.18 mm in the two-haptics group. The decentration in the two-haptic group was greater than in the one-haptic group, but not significantly. Visual acuity and refractive power were not significantly different between the groups. The mean operation time (minutes) was 65.00 ± 22.69 and 93.66 ± 29.54 in the one-haptic and two-haptic groups, respectively. The operation time in the one-haptic group was significantly shorter than in the two-haptic group (p = 0.020). When comparing visual acuity preoperatively and postoperatively, both groups showed significant improvement (p < 0.01). However, refractive error and postoperative IOL decentration were similar between the groups. CONCLUSIONS: The short-term surgical results of transscleral fixation using the two surgical techniques were not different; one-haptic transscleral fixation was preferred due to shorter operation time and lower patient discomfort.

Clinical Outcomes of the Surgical Management with Dislocated Posterior Chamber Intraocular Lens

PURPOSE: To evaluate the clinical outcomes of the surgical treatment in patients with dislocation of an intraocular lens (IOL). METHODS: The present study investigated the postoperative naked visual acuity, corrected visual acuity, astigmatism, and postoperative complications in patients with a minimum follow-up of 1 month after the surgical treatment of a dislocated posterior chamber IOL. RESULTS: The study included 48 eyes of 48 patients (32 males and 16 females) with an age ranging from 33 to 76 years with a mean of 56.7 years at initial visit. The mean time interval from cataract extraction and IOL implantation to dislocation of IOL was 4.9 years. The IOL was exchanged in 13 eyes and was repositioned in 35 eyes. The IOL was repositioned without tying in 11 eyes, by scleral fixation with tying inside the eye in 10 eyes, and by scleral fixation with tying outside the eyeball in 14 eyes. The mean naked visual acuity improved from 1.21 +/- 0.70 to 0.70 +/- 0.48 (p = 0.001) and the best corrected visual acuity improved significantly from 0.82 +/- 0.68 to 0.35 +/- 0.30 (p = 0.002). Among the repositioned IOLs managed by IOL repositioning using scleral fixation with tying inside the eye, 4 eyes re-dislocated. These eyes were re-treated for a second time with IOL repositioning and scleral fixation with tying outside the eye. CONCLUSIONS: Surgical management of dislocated IOLs resulted in significant improvement of visual acuity. Scleral fixation with tying inside the eye had a high risk of re-dislocation because of the difficulty in tightly securing the knot.