The Tokyo Metropolitan Home Vision Screening Program for amblyopia in 3-year-old children

Area of Science:

• Public Health
• Ophthalmology
• Pediatrics

Background:

• Amblyopia, or 'lazy eye,' is a leading cause of vision impairment in children.
• Early detection and intervention are crucial for effective amblyopia treatment.
• Vision screening programs are essential for identifying at-risk children.

Purpose of the Study:

• To evaluate the effectiveness of a home-based vision screening program for 3-year-old children in Tokyo.
• To determine the prevalence of amblyopia in this age group using a novel screening method.
• To assess the efficiency and cost-effectiveness of the implemented screening program.

Main Methods:

• A pilot study was conducted in 1988 involving 1,303 children aged 3 years 1 month.
• A vision screening program was officially launched in August 1989 by the Tokyo Metropolitan Government.
• The screening utilized picture cards of familiar figures for home-based vision testing, integrated into existing health check-ups.
• Follow-up ophthalmological examinations were provided for referred children.

Main Results:

• The 1988 pilot study identified five cases (0.38%) of amblyopia.
• Within the first eight months of the official program, 21,906 children were screened.
• 1.9% (419 children) were referred for specialist examination.
• Amblyopia was diagnosed in 0.19% (41 children) of those screened.

Conclusions:

• The home vision test is an efficient and cost-effective method for early amblyopia detection in young children.
• Integrating vision screening into routine health check-ups enhances program reach and impact.
• The program successfully identified children with amblyopia, enabling timely intervention and improved visual outcomes.