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Feasibility of saccadic vector optokinetic perimetry: a method of automated static perimetry for children using eye
Ian C Murray1, Brian W Fleck, Harry M Brash
1University of Edinburgh, Department of Child Life and Health, Edinburgh, UK. Ian.Murray@ed.ac.uk
Insights
This study shows that eye-tracking perimetry is a feasible method for assessing visual fields in children. The new technique accurately detects visual field defects, offering a promising alternative for pediatric eye examinations.
Area of Science:
- Ophthalmology
- Medical Technology
- Visual Science
Background:
- Automated static perimetry is crucial for diagnosing visual field defects.
- Current methods can be challenging for pediatric patients.
- New, child-friendly perimetry techniques are needed.
Purpose of the Study:
- To evaluate the feasibility of a novel suprathreshold automated static perimetry technique utilizing eye tracking in children.
- To assess the accuracy of this new method in identifying visual field abnormalities.
Main Methods:
- A new eye-tracking system was developed, integrating a PC, display, and eye tracker.
- Subjects (adults and children) underwent eye-tracking perimetry tests.
- Results were compared with the Humphrey Field Analyzer (HFA) in adults and clinical assessments in children.
Main Results:
- The eye-tracking perimetry achieved high agreement (99.2% in adults, 99.1% in children) with healthy visual fields.
- It correctly identified visual field defects in adults (89.8% agreement with HFA) and children.
- The system demonstrated successful detection of visual field defects in pediatric participants.
Conclusions:
- Suprathreshold automated static perimetry with eye tracking is a viable and promising diagnostic tool for children.
- This technology offers a potential advancement in pediatric visual field testing.
- The findings support the use of eye-tracking perimetry in pediatric ophthalmology.
Purpose:
To determine the feasibility of a new technique for suprathreshold automated static perimetry in children.
Design:
Evaluation of diagnostic test or technology.
Participants:
The study included 29 subjects comprising 4 groups: 12 adults with normal fields, 4 children aged less than 10 years with normal fields, 8 adults with visual field defect, and 5 children aged less than 10 years with suspected visual field defects.
Methods:
The system comprises a personal computer, display, and eye tracker to monitor gaze position when stimuli are presented in the visual field. The natural saccadic eye movement to fixate on the stimuli, if seen, can be detected and measured to produce a visual field plot. Subjects performed 3 eye-tracking tests, unless unable to do so for any reason: a 40-point binocular test and two 41-point tests for each eye. The tests were based on the Humphrey Field Analyzer (HFA) Central-40 point screening test with a stimulus size of Goldmann III and intensity of 14 decibels (dB). Adults also performed the equivalent Humphrey screening test in each eye for comparison.
Main Outcome Measures:
Comparison of visual field plot results between the eye-tracking tests and HFA tests in adults. Correlation between the eye-tracking tests and the clinical assessment in the children with suspected visual field defects.
Results:
In the eyes of all normal adult and child subjects performing the eye-tracking test, the percentage of points in agreement with a healthy visual field was 99.2% and 99.1%, respectively. The percentage of points agreeing with the HFA's screening test in the adult eyes with visual field defects was 89.8%. Visual field defects were also correctly identified by the eye-tracking system in the eyes of children with suspected visual field defects.
Conclusions:
The results demonstrate that suprathreshold automated static perimetry using eye tracking is a promising method of perimetry for use with children.
