A new study by Tel Aviv University may provide an objective tool to accurately diagnose ADHD. The researchers used an eye-tracking system to monitor the involuntary eye movements of two groups of 22 adults taking an ADHD diagnostic computer test.
The exercise lasted 22 minutes, and was repeated twice. The first group, diagnosed with ADHD, initially took the test unmedicated and then took it again under the influence of methylphenidate. A second group, not diagnosed with ADHD, acted as the control group.
The researchers found a direct correlation between ADHD and the inability to suppress eye movement in the anticipation of visual stimuli. Research also reflected improved performance by taking methylphenidate, which normalised the suppression of involuntary eye movements.