New Developed 4 Dot Light Test Mobile Application
Rosario Gómez-de-Liaño, MD, PhD; Maria Nieves-Moreno, MD; Laura Morales-Fernández, MD, PhD
Hospital Clínico San Carlos
Introduction: To present a newly developed mobile application to evaluate the 4 Dot Light test in children, that could be more versatile and also be able to evaluate the sustained fusion angle at different distances.
Methods: The new application has both pediatric and adult images with different sizes to evaluate the sustained angle, a version with 3 and 4 images, changes on the test to avoid memorization and sounds to implement the use in smaller children. We compared this new device with the projector 4WLT in 23 adults.
Results: We present the mathematical values of the sustained angle of the test when used from 5 meters to 20 centimeters, and the estimated value of peripheral, macular and foveal fusion. 82,61% and 86,96% of the patients had distance foveal fusion with the projector and the mobile app device respectively, and 17,39% and 13,04% had macular fusion. The concordance between the projector and the app was k = 0,832.
Discussion: The 4 Dot Light mobile application has a high correlation with the standard projector 4WLT.
Conclusion: The new Worth Test mobile application could be useful in the daily practice to measure foveal, macular andperipheral sustained fusion angles both in children and adults.
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- American Academy of Ophthalmology (2014). Worth’s 4-Dot Test Retrieved http://one.aao.org/bcscsnippetdetail.aspx?id=8200e4a2-f7ee-47f4-b8b7-985b30b52f67.