Related Experiment Video
Updated: Jul 26, 2026
Stereoacuity Improvement using Random-Dot Video Games
Published on: January 14, 2020
Computerized method of visual acuity testing: adaptation of the amblyopia treatment study visual acuity testing
P S Moke1, A H Turpin, R W Beck
1Jaeb Center for Health Research, 3010 East 138th Ave., Suite 9, Tampa, Florida 33613, USA.
Insights
A new computerized method accurately measures visual acuity in young children using the Amblyopia Treatment Study protocol. This automated system offers reliable results for pediatric vision testing.
Area of Science:
- Ophthalmology
- Pediatric Vision Science
- Medical Technology
Background:
- Accurate visual acuity measurement is crucial for diagnosing and managing pediatric eye conditions like amblyopia.
- Traditional methods can be challenging to administer consistently in young children.
- The Amblyopia Treatment Study (ATS) protocol provides a standardized approach to visual acuity testing.
Purpose of the Study:
- To develop and report a novel computerized method for determining visual acuity in children.
- To implement the Amblyopia Treatment Study (ATS) visual acuity testing protocol using a computerized system.
- To evaluate the reliability and effectiveness of this automated method for pediatric vision assessment.
Main Methods:
- A computerized visual acuity tester was developed using a handheld device (Palm OS) communicating with a PC (Linux).
- The system displays single letters at a 3m distance, covering a range from 20/800 to 20/12.
- A C program executed the ATS protocol, with visual acuity tested and retested in 156 children aged 3-7 years across four sites.
Main Results:
- High test-retest reliability was observed: r = .92 (right eye) and r = .95 (left eye).
- 88% of right eye and 94% of left eye retests were within 0.1 logarithm of minimal angle of resolution (logMAR) units.
- Calculated 95% confidence intervals were +/- 0.13 logMAR for acuity scores and +/- 0.19 logMAR for score differences.
Conclusions:
- A computerized method for visual acuity measurement in children has been successfully developed.
- Automating the Amblyopia Treatment Study (ATS) protocol is an effective approach for testing visual acuity in children aged 3-7.
- This technology offers a reliable and potentially more efficient way to assess pediatric vision.
Purpose:
To report a computerized method for determining visual acuity in children using the Amblyopia Treatment Study visual acuity testing protocol.
Methods:
A computerized visual acuity tester was developed that uses a programmed handheld device that uses the Palm operating system (Palm, Inc, Santa Clara, California). The handheld device communicates with a personal computer running a Linux operating system and 17-inch monitor. At a test distance of 3 m, single letters can be displayed from 20/800 to 20/12. A C program on the handheld device runs the Amblyopia Treatment Study visual acuity testing protocol. Using this method, visual acuity was tested in both the right and left eyes, and then the testing was repeated in 156 children age 3 to 7 years at four clinical sites.
Results:
Test-retest reliability was high (r =.92 and 0.95 for and right and left eyes, respectively), with 88% of right eye retests and 94% of left eye retests within 0.1 logarithm of minimal angle of resolution (logMAR) units of the initial test. The 95% confidence interval for an acuity score was calculated to be the score +/- 0.13 logMAR units. For a change between two acuity scores, the 95% confidence interval was the difference +/- 0.19 logMAR units.
Conclusions:
We have developed a computerized method for measurement of visual acuity. Automation of the Amblyopia Treatment Study visual acuity testing protocol is an effective method of testing visual acuity in children 3 to 7 years of age.
