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The Myopic Shift in Aphakic Eyes in the Infant Aphakia Treatment Study After 10 Years of Follow-up
Scott R Lambert1, Azhar Nizam, Lindreth DuBois
1Department of Ophthalmology (S.R.L.), Stanford University School of Medicine, Palo Alto, CA; Department of Biostatistics and Bioinformatics (A.N., G.C.), Rollins School of Public Health, Emory University, Atlanta, GA; Department of Ophthalmology (L.D.), School of Medicine, Emory University, Atlanta, GA; Department of Ophthalmology (D.R.W.), Southwestern University, Dallas, TX; and Storm Eye Institute (M.E.W.), Medical University of South Carolina, Charleston, SC.
Insights
Children undergoing unilateral cataract surgery showed a significant myopic shift in their aphakic eyes, decreasing refractive error by 44% over 10.5 years. Most children who remained aphakic continued to wear contact lens correction.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
Background:
- Unilateral cataract surgery in infancy leads to aphakia, requiring optical correction.
- Longitudinal data on refractive error changes in these children is crucial for management.
Purpose of the Study:
- To track the myopic shift in aphakic eyes of children after unilateral cataract surgery.
- To analyze refractive error changes over 10.5 years in the Infant Aphakia Treatment Study (IATS) cohort.
Main Methods:
- Children in the IATS were randomized to aphakia and contact lens correction post-surgery.
- Ocular examinations were performed at regular intervals until 10.5 years of age.
Main Results:
- Refractive error in aphakic eyes decreased by 44% from infancy to 10.5 years.
- The rate of myopic shift slowed over time: -2.11 D/year (0-1.5 yrs), -0.68 D/year (1.5-5 yrs), -0.35 D/year (5-10.5 yrs).
- At 10.5 years, two-thirds of children with aphakia continued to wear contact lenses.
Conclusions:
- Aphakic eyes in children treated for unilateral cataracts experience significant myopic shifts.
- Contact lens correction remains a primary method for managing aphakia in this population.
Objectives:
To report the myopic shift in the aphakic eyes of a cohort of children who underwent unilateral cataract surgery during infancy and were then followed longitudinally for 10.5 years.
Methods:
One-half of the children enrolled in the Infant Aphakia Treatment Study (IATS) were randomized to aphakia and contact lens correction after unilateral cataract surgery. They then underwent ocular examinations using standardized protocols at prescribed time intervals until age 10.5 years.
Results:
Thirty of 57 children randomized to aphakia remained aphakic at age 10.5, having undergone unilateral cataract surgery at a median age of 1.6 (IQR: 1.1-3.1) months. The median refractive error (RE) in the 57 eyes randomized to aphakia immediately after cataract surgery was 19.01 D (IQR: 16.98-20.49) compared to 10.38 D (IQR: 7.50-14.00) for the 30 eyes that remained aphakic at age 10.5 years. The mean change in RE in aphakic eyes was -2.11 D/year up to age 1.5 years, -0.68 D/year from 1.5 to 5.0 years, and -0.35 D/year from age 5 to 10.5 years. At age 10.5 years, 18 patients continued to wear a contact lens correction (silicone elastomer, n=6; gas permeable, n=6; hydrogel, n=5; and silicone hydrogel, n=1) (median RE, 12.50 D), 9 wore only spectacles (median RE, 4.00 D), and 4 wore no correction (median RE, 11.25 D) to correct their aphakic eye.
Conclusions:
The RE in aphakic eyes decreased by 44% from infancy to age 10.5 years. About two-thirds of children who remained aphakic at age 10.5 years continued to wear a contact lens.
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