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Updated: Dec 27, 2025
Author Spotlight: An Automated Method for Assessing Visual Acuity in Infants and Toddlers Using an Eye-Tracking System
Published on: March 17, 2023
A computerized resolution visual acuity test in preschool and school age children
Ying-Yan Qin1, Zhen-Zhen Liu1, Li-Yuan Zhu1
1State key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China.
Insights
The novel Autoacuity Tester shows high validity and repeatability for visual acuity testing in children. It is more sensitive than the Teller Acuity Card for detecting amblyopia in preschoolers.
Area of Science:
- Ophthalmology
- Pediatric Optometry
- Vision Science
Background:
- Amblyopia, or
Purpose of the Study:
- To introduce and validate the Autoacuity Tester, a novel device for assessing visual acuity in children.
- To determine the sensitivity and specificity of the Autoacuity Tester in detecting amblyopia.
Main Methods:
- The Autoacuity Tester's validity was assessed in 552 children (aged 3-12 years) by comparing it with standard acuity charts (ETDRS, Lea Symbols, TAC).
- Repeatability was evaluated using the coefficient of repeatability (COR).
- Sensitivity and specificity for amblyopia detection were calculated.
Main Results:
- The Autoacuity Tester demonstrated strong agreement with standard tests (ETDRS, Lea Symbols, TAC) in both school-aged and preschool children.
- Repeatability was comparable or superior to standard methods, with a COR of 0.20 logMAR for the Autoacuity Tester in school-aged children and 0.13 logMAR in preschoolers.
- The Autoacuity Tester showed significantly higher sensitivity (88%) compared to TAC (72%) for amblyopia detection in preschoolers (P=0.04), with similar specificity (92% vs 90%).
Conclusions:
- The Autoacuity Tester is a valid and reliable tool for visual acuity assessment in children.
- It offers improved testability and repeatability, particularly for preschool-aged children.
- This novel device presents a promising alternative for pediatric vision screening and diagnosis.
Aim:
To develop a novel approach called the Autoacuity Tester, and to evaluate its validity, especially the sensitivity and specificity for detecting amblyopia.
Methods:
Children aged from 3 to 12y (n=552) were enrolled in the study. The validity of the Autoacuity Tester was evaluated by comparing it to the Tumbling E Early Treatment Diabetic Retinopathy Study (ETDRS) acuity chart for school age children, and Lea Symbols and Teller acuity card (TAC) for preschool children. The repeatability was assessed by coefficient of repeatability (COR). The sensitivity and specificity for detecting amblyopia were calculated.
Results:
The mean difference (95% limits of agreement) between the Autoacuity Tester and the ETDRS tests were -0.03 (-0.24, 0.19) logMAR for the school age group. In preschool children, the mean difference was 0.04 (-0.14, 0.21) logMAR between the Autoacuity Tester and the TAC and 0.00 (-0.17, 0.18) logMAR between the Autoacuity Tester and the Lea Symbols. For the school age group, the COR was 0.20 logMAR for the Autoacuity Tester and 0.18 logMAR for the ETDRS. For the preschool group, the COR was 0.13 logMAR for the Autoacuity Tester and 0.21 logMAR for TAC. The Autoacuity Tester (88%) is more sensitive than TAC (72%) in detecting amblyopia (P=0.04), while had similar specificity (92% vs 90%, P=0.20).
Conclusion:
The Autoacuity Tester provides a reliable alternative for assessing visual acuity, and offers advantage of higher testability and repeatability for preschool children.
