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Validation of a school-based amblyopia screening protocol in a kindergarten population
Pilar Casas-Llera1,2, Paula Ortega2, Inmaculada Rubio2
1Pediatric Ophthalmology Department, Vissum Alicante, Alicante - Spain.
Insights
This study validates a school-based amblyopia screening program for young children. The program demonstrated high accuracy in identifying amblyopia risk, making it a valuable tool for early detection in schools.
Area of Science:
- Ophthalmology
- Pediatric Vision Screening
- Public Health
Background:
- Amblyopia, or "lazy eye," is a leading cause of vision impairment in children.
- Early detection and intervention are crucial for effective amblyopia treatment.
- School-based screening programs offer a practical approach to reach young children.
Purpose of the Study:
- To validate a school-based amblyopia screening program model.
- To compare the program's outcomes with conventional ophthalmic clinic examinations.
- To assess the program's effectiveness in a kindergarten population (4-5 years old).
Main Methods:
- A school-based protocol included visual acuity, ocular alignment, motility, and stereoacuity tests.
- Qualified healthcare professionals administered the screening.
- A subset of children underwent a conventional ophthalmologic examination for validation.
Main Results:
- The study screened 18,587 children aged 4-5 years.
- The screening model achieved 89.3% sensitivity and 93.1% specificity.
- Positive and negative predictive values were 83.3% and 95.7%, respectively.
Conclusions:
- The school-based amblyopia screening model demonstrates high sensitivity and specificity.
- The program effectively identifies children at high risk for amblyopia.
- This screening approach is highly relevant for school-based vision health initiatives.
Purpose:
To validate a school-based amblyopia screening program model by comparing its outcomes to those of a state-of-the-art conventional ophthalmic clinic examination in a kindergarten population of children between the ages of 4 and 5 years.
Methods:
An amblyopia screening protocol, which consisted of visual acuity measurement using Lea charts, ocular alignment test, ocular motility assessment, and stereoacuity with TNO random-dot test, was performed at school in a pediatric 4- to 5-year-old population by qualified healthcare professionals. The outcomes were validated in a selected group by a conventional ophthalmologic examination performed in a fully equipped ophthalmologic center. The ophthalmologic evaluation was used to confirm whether or not children were correctly classified by the screening protocol. The sensitivity and specificity of the test model to detect amblyopia were established.
Results:
A total of 18,587 4- to 5-year-old children were subjected to the amblyopia screening program during the 2010-2011 school year. A population of 100 children were selected for the ophthalmologic validation screening. A sensitivity of 89.3%, specificity of 93.1%, positive predictive value of 83.3%, negative predictive value of 95.7%, positive likelihood ratio of 12.86, and negative likelihood ratio of 0.12 was obtained for the amblyopia screening validation model.
Conclusions:
The amblyopia screening protocol model tested in this investigation shows high sensitivity and specificity in detecting high-risk cases of amblyopia compared to the standard ophthalmologic examination. This screening program may be highly relevant for amblyopia screening at schools.
