Augmented loop myopexy with concurrent intraocular lens implantation for myopic strabismus fixus

Abstract

Purpose: To evaluate safety profile and surgical outcomes of loop myopexy with concurrent intra-ocular lens implantation in cases of myopic strabismus fixus (MSF). Methods: A retrospective chart review of patients who underwent loop myopexy with concurrent small incision cataract surgery with intra-ocular lens implantation between January 2017 and July 2021 for MSF at a tertiary eye care centre was undertaken. A minimum of 6 months of follow-up after surgery was required for inclusion. The main outcome measures were improvement in alignment postoperatively, improvement in extra-ocular motility postoperatively, intraoperative and postoperative complications and post-operative visual acuity. Results: 12 eyes of 7 patients (male (6): female (1)) underwent modified loop myopexy at a mean age of 46.86 years (range 32-65 years). 5 patients underwent bilateral loop myopexy with intra-ocular lens implantation whereas 2 patients underwent unilateral loop with intra-ocular lens implantation. All eyes underwent additional medial rectus (MR) recession with lateral rectus (LR) plication. At the last follow-up, mean esotropia improved to 16 prism dioptres (PD) (Range: 10-20 PD) from 80 PD (Range:60-90PD), P = 0.016; and success (deviation ≤20PD) was achieved in 73% (95% CI 48 to 89%). Mean hypotropia at presentation was 10 PD (range 6-14 PD), which improved to 0 PD (range 0-9 PD), P = 0.063. Mean BCVA improved from 1.08 LogMar to 0.3 LogMar units. Conclusion: Loop myopexy combined with intra-ocular lens implantation is a safe and effective procedure in the management of patients who have Myopic Strabismus Fixus with visually significant cataract and improves both visual acuity and ocular alignment significantly.

Keywords

• extra-ocular muscles
• myopia
• strabismus fixus