<b><i>Introduction:</i></b> This study aimed to report the visual acuity outcomes and complications of sutured scleral fixation of posterior chamber intraocular lens (IOL) in children under 9 years old with congenital ectopia lentis. <b><i>Methods:</i></b> Twenty-six children (47 eyes) with congenital ectopia lentis were included in this study. The mean age at surgery was 61.6 ± 22.3 months (range, 32–94). Patients underwent lens extraction, anterior vitrectomy, and sutured scleral fixation of posterior chamber IOL. The implanted IOL included rigid polymethyl methacrylate (PMMA) IOL (CZ70BD, <i>n</i> = 36) and foldable IOL (SA60AT, <i>n</i> = 9, and LI61SE, <i>n</i> = 2). The outcome measures used to assess the benefits were uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), refraction, intraocular pressure, and any associated complications. Median follow-up was 33.0 months (range, 4–129). <b><i>Results:</i></b> After surgery, the median UCVA (1.30 vs. 0.35 logMAR) and BCVA (0.82 vs. 0.15 logMAR) improved significantly (<i>p</i> < 0.001). The median absolute spherical values decreased considerably (9.00 vs. 0.75 D; <i>p</i> < 0.001). The median astigmatism was lower in foldable IOL compared to rigid PMMA IOL (1.0 vs. 2.5 D; <i>p</i> = 0.026), but neither the UCVA nor BCVA was significantly different. There was no intraoperative complication. Postoperative complications included pupillary capture in 4 eyes (9%), IOL decentration in 4 eyes (9%), choroid edema in 1 eye (2%), and subretinal hemorrhage in 1 eye (2%). The rate of secondary surgery was 9%, caused by IOL decentration of IOL haptics which was broken in 3 eyes and suture degradation in 1 eye. <b><i>Conclusion:</i></b> Sutured scleral fixation of posterior chamber IOL provided good visual outcomes in children under 9 years of age with congenital ectopia lentis. Although there were some risks of secondary surgery, the complications were acceptable.
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