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. 2017 Jun;6(1):115-122.
doi: 10.1007/s40123-016-0071-5. Epub 2016 Nov 24.

Normal Threshold Size of Stimuli in Children Using a Game-Based Visual Field Test

Yanfang Wang  1   2 , Zaria Ali  1 , Siddharth Subramani  1 , Susmito Biswas  1   3 , Cecilia Fenerty  1   2 , David B Henson  1   2 , Tariq Aslam  4   5   6
Affiliations

Normal Threshold Size of Stimuli in Children Using a Game-Based Visual Field Test

Yanfang Wang et al. Ophthalmol Ther. 2017 Jun.

Abstract

Introduction: The aim of this study was to demonstrate and explore the ability of novel game-based perimetry to establish normal visual field thresholds in children.

Methods: One hundred and eighteen children (aged 8.0 ± 2.8 years old) with no history of visual field loss or significant medical history were recruited. Each child had one eye tested using a game-based visual field test 'Caspar's Castle' at four retinal locations 12.7° (N = 118) from fixation. Thresholds were established repeatedly using up/down staircase algorithms with stimuli of varying diameter (luminance 20 cd/m2, duration 200 ms, background luminance 10 cd/m2). Relationships between threshold and age were determined along with measures of intra- and intersubject variability.

Results: The Game-based visual field test was able to establish threshold estimates in the full range of children tested. Threshold size reduced with increasing age in children. Intrasubject variability and intersubject variability were inversely related to age in children.

Conclusions: Normal visual field thresholds were established for specific locations in children using a novel game-based visual field test. These could be used as a foundation for developing a game-based perimetry screening test for children.

Keywords: Child health; Game-based test; Pediatrics; Perimetry; Visual field.

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Figures

Fig. 1
Fig. 1
Casper’s Castle game-based visual field test for children (a). During the test, the participants were encouraged to look at the fixation point (b, c). They were instructed to press their control to get the Prince Casper to sweep the googlie up into the box when it became large (c) and to press their control to vacuum up any peripheral googlies (d) when they appear
Fig. 2
Fig. 2
Relationship between threshold size level and age in children
Fig. 3
Fig. 3
Relationship between intrasubject variability and age in children
Fig. 4
Fig. 4
Relationship between intersubject variability and age in children at eccentricity of 12.7°
See this image and copyright information in PMC

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