Validation and cost-effectiveness of a home-based screening system for amblyopia

Area of Science:

• Ophthalmology
• Public Health
• Diagnostic Technology Evaluation

Background:

• Amblyopia, or

Purpose of the Study:

• To evaluate the cost-effectiveness of a novel home-based screening system for detecting amblyopia and amblyogenic risk factors in preschoolers.
• To assess the diagnostic accuracy and cost-benefit of a parent-administered screening tool compared to professional eye examinations.

Main Methods:

• A diagnostic test evaluation study was conducted.
• 2,442 preschoolers (3-6 years) from 10 kindergartens in Guangzhou were randomly selected.
• Parents used a home-based system for initial screening, with results compared against comprehensive professional eye examinations.

Main Results:

• The home-based system demonstrated a sensitivity of 80.0% and specificity of 94.1% for detecting amblyopia.
• The cost per detected amblyopia case was significantly lower with the home-based method (US $266.00) compared to professional examinations (US $1131.00).
• Detection rates for amblyogenic risk factors varied, with true positive rates of 46.0% (Grade I), 33.3% (Grade II), and 15.6% (Grade III) using the home-based system.

Conclusions:

• The home-based amblyopia screening system is a simple, effective, and cost-beneficial tool.
• This approach provides a practical option for widespread amblyopia screening, particularly in resource-limited settings.
• Early detection of amblyopia and risk factors can be facilitated through accessible home-based screening.