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Screening of amblyopic children and long-term follow-up
M L Latvala1, M Paloheimo, A Karma
1Ophthalmology Unit, Tampere Community Health Center, Finland.
Insights
Early detection and treatment of amblyopia in children significantly improve long-term visual acuity. Prompt intervention using occlusion therapy and regular follow-ups are crucial for successful outcomes in pediatric vision care.
Area of Science:
- Ophthalmology
- Pediatric Vision Care
- Public Health
Background:
- Amblyopia, or 'lazy eye,' affects a significant number of preschool children.
- Early identification and management are critical to prevent long-term visual impairment.
- Community health centers play a vital role in initial screening and referral.
Purpose of the Study:
- To evaluate the long-term visual outcomes of amblyopic children treated through a community health center.
- To identify risk factors associated with functional amblyopia in preschool children.
- To assess the effectiveness of various treatment modalities, including occlusion and atropine therapy.
Main Methods:
- Prospective study of 526 referred children (1982-1983) with suspected visual disorders.
- Diagnosis of amblyopia in 109 children, with detailed risk factor analysis.
- Treatment included full-time occlusion, atropine for infants, and pleoptics for older children, with long-term follow-up (average 9.7 years).
Main Results:
- Functional amblyopia was diagnosed in 91 children, with risk factors including strabismus and significant refractive errors.
- 79% of treated children (72/91) achieved visual acuity of 0.4 or better at long-term follow-up.
- Only 4% of these children had visual acuity less than 0.4 after nearly a decade.
Conclusions:
- Effective treatment of amblyopia leads to excellent long-term visual acuity in most children.
- Integrated child health, school healthcare, and accessible ophthalmological services are essential for optimal outcomes.
- Timely intervention and consistent therapy are key to successful amblyopia management.
Abstract:
A prospective study of amblyopic children was carried out in 1982-1992 in the ophthalmology unit of a community health center, a referral center for 14,000 preschool children. Five hundred and twenty-six children in 1982-1983 were referred to an ophthalmologist because of a suspicion of amblyopia, strabismus or other visual disorders. Amblyopia was diagnosed in 109 children. In 18 children amblyopia was on an organic basis and among them 4 children had X-chromosomal retinoschisis. Risk factors for functional amblyopia were convergent strabismus, spherical equivalent of the refractive error of 3.5 dioptres or more or anisometropia of 1.0 dioptres or more. The children with established functional amblyopia (91 children) were treated with a full-time occlusion, or, at the age of younger than 18 months, with 0.5% atropin, and, at the minimum of 6 years, with pleoptics when indicated. One hundred amblyopic children were followed for a minimum of 4 years, reinstituting the occlusion therapy if visual acuity deteriorated. Seventy-two children with functional amblyopia (79%) were available for a detailed ophthalmological examination 9.7 years, on the average, after the initial examination. Only three of these children (4%) had visual acuity of less than 0.4 at that time. Well-functioning child health centers and school health care, as well as the availability of ophthalmological services, are important for a good final visual result of amblyopic children.