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Prediction error in iris suture fixated intraocular lenses and long-term stability
Derick O Ansah1, Ximin Li2, Peter L Gehlbach1
1The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
Clinical & Experimental Ophthalmology
|September 1, 2020
Summary
Iris-suture fixation of intraocular lenses shows minimal prediction error, though adjustments may be needed for longer eyes. This technique remains viable with careful monitoring for re-subluxation.
Area of Science:
- Ophthalmology
- Intraocular Lens Implantation
- Refractive Surgery
Background:
- Limited data exists on prediction error for iris-sutured intraocular lenses.
- Iris-suture fixation is used for subluxated intraocular lenses.
Purpose of the Study:
- To assess prediction error magnitude and influencing factors in iris-sutured intraocular lenses.
- To evaluate the long-term stability and outcomes of this surgical technique.
Main Methods:
- Retrospective case series of adult patients undergoing iris-suture fixation for subluxated intraocular lenses.
- Prediction error calculated using standard formulas; survival analysis performed for re-subluxation.
Main Results:
- Mean prediction error was -0.35 ± 1.0 D with the Barrett Universal II formula.
- Higher axial length (≥25.5 mm) correlated with increased prediction error (P=.048).
- Twelve re-subluxations occurred; predicted 50% survival was 114.25 months.
Conclusions:
- Iris-suture fixation is a viable technique for subluxated intraocular lenses.
- Lens power adjustments may be necessary, particularly for longer eyes.
- Routine monitoring is essential due to the risk of re-subluxation.
