Related Experiment Video
Updated: Jan 13, 2026
Iris Fixation via External Pentagram Suturing
Published on: May 5, 2022
Comparison of flanged intrascleral haptic fixation and 2-point transscleral Gore-Tex-sutured IOL fixation:
Chun-Hsiang Chang1, Jia-Horung Hung, Yi-Sheng Chang
1From the Department of Ophthalmology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan (C.-H. Chang, Hung, Y.-S. Chang, Lee); Spencer Center for Vision Research, Byers Eye Institute, Stanford University School of Medicine, Palo Alto, California (Hung); Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan (Hung); Department of Ophthalmology, College of Medicine, National Cheng Kung University, Tainan, Taiwan (Y.-S. Chang); Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan, Taiwan (Lee).
Purpose:
To compare the short-term and long-term visual and refractive outcomes between flanged intrascleral haptic fixation (FIHF) and 2-point transscleral polymethyl methacrylate (PMMA) intraocular lens (IOL) fixation using Gore-Tex sutures in patients lacking capsular support.
Setting:
National Cheng Kung University Hospital, Tainan, Taiwan.
Design:
Retrospective cohort study using propensity score matching to minimize baseline differences between groups.
Methods:
Medical records of adult patients who underwent FIHF or Gore-Tex-sutured IOL fixation between 2014 and 2024 were reviewed. Patients with less than 12-month follow-up or conditions affecting visual prognosis were excluded. Postoperative corrected distance visual acuity (CDVA), refractive cylinder, and complications were analyzed.
Results:
82 eyes (46 FIHF, 36 sutured) were identified; after matching, 34 eyes in each group were analyzed. After matching, the FIHF group demonstrated significantly better CDVA than the sutured IOL group at 1 month (mean logMAR, 0.73 vs 1.08; P = .003) and 3 months (0.62 vs 0.94; P = .009) postoperatively. Cylindrical power at 3 months was significantly lower in the FIHF group (1.94 vs 3.69 diopter, P = .009), indicating less surgically induced astigmatism. No significant differences were observed in CDVA, complication rates, or refractive outcomes at 12 months.
Conclusions:
FIHF may facilitate earlier reduction in astigmatism, thereby promoting faster visual recovery, particularly in cases of IOL subluxation or dislocation, compared with sutured IOL fixation. However, no significant differences were observed between the 2 groups in visual acuity, refractive status, or complication rates at 1 year postoperatively.
