A new visual acuity test on touchpad for vision screening in children

Area of Science:

• Ophthalmology
• Pediatric Medicine
• Medical Technology

Background:

• Visual acuity (VA) testing is crucial for early detection of vision problems in children.
• Traditional VA tests can be challenging to administer to young children.
• Digital health solutions offer potential improvements in pediatric eye screening.

Purpose of the Study:

• To validate a novel visual acuity (VA) test application on a touchpad.
• To compare the VA results from the touchpad application with conventional testing methods in children.
• To assess the efficiency and accuracy of the digital VA test for pediatric screening.

Main Methods:

• A cohort of 101 children (ages 3-10) underwent both standard and touchpad VA testing.
• Monocular and binocular VA were assessed using the application and conventional methods.
• Exclusion criteria included inability to use the touchpad; evaluations also covered test duration, pain, comprehension, attention, and preference.

Main Results:

• The touchpad VA test showed good linear and intra-class correlation with conventional tests (ICC range: 0.50-0.74).
• No significant differences were found between the digital and standard tests for right eye, left eye, or binocular acuity (P > 0.08).
• The application demonstrated high sensitivity (92%) and specificity (80%) for detecting amblyopia.

Conclusions:

• The touchpad visual acuity application is an effective and validated tool for pediatric screening.
• The application offers a reliable method for assessing VA in children.
• High specificity suggests its utility in identifying children with potential visual impairments.