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KJ Ciuffreda, D Rutner; A New Objective Oculomotor Visual Feedback Training System . Invest. Ophthalmol. Vis. Sci. 2002;43(13):960.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: Although oculomotor auditory feedback training has been successful in improving fixation in adults with eye movement abnormalities, conceptualization of the requisite auditory-oculomotor transform is frequently too difficult for young children to acquire. Hence, we developed a new system to determine if instead oculomotor visual feedback can be conceptualized and incorporated by young children to improve both easily and rapidly their eye movement control. Method: Five visually-normal young children (ages 5, 6, 7.5, 9 and 9.5 years; 20/20) and one nystagmat (age 7 years; 20/30) were tested. In addition, pilot studies involved testing of five visually-normal adults and one adult nystagmat (20/200) as controls. Horizontal eye movements of the right eye were recorded by infrared oculography during binocular viewing. By special electronic circuitry, the childrens' eye movements were fed back to the video system and controlled visibility of a small (8º H, 11º V) video image of a storyteller placed in the lower center of an otherwise blank TV monitor situated 33 cm away along the midline. Children were instructed to maintain and/or reduce their fixational eye movements within preselected criterion levels (± 1.75 - 3.5º) using electronic deadband control. If they did, both the video and audio aspects remained present; however, if they did not, the video aspect was extinguished, until the criterion level of fixation was attained and/or regained. Results: All 6 children readily understood the training paradigm and successfully repeatedly controlled their fixation at criterion levels (± 1.75 - 3.5º) at least 90% of the time for the 15 - 120 second test intervals, after only 1 hour of training. Similar results were found in the adult control subjects. Conclusion: Hence both the task and cognitive demand were age appropriate, and oculomotor neurological maturity sufficient, to perform well. Oculomotor-based, visual feedback training incorporating a high interest/attentional task appears to be a viable alternative to auditory feedback and other conceptually more complicated techniques in young children with oculomotor dysfunction. CR: None Support: NIH T35 EY07079 -14
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