Starting about 3 weeks ago after working all day in front of a computer, my eyes feel odd and my eyelids blink frequently and is a little difficult to keep open. Sometimes it feels like there is extra fluid in them. I ve tried eye drops for dry eyes but that didn t seem to make a difference. They blink simultaneously. Anytime of the day when driving, the air conditioning air blowing seems to cause my eyes to want to blink. Four weeks ago I started on Methylphenidate 20mg twice day 4 hours apart. That says can cause blurry vision but that doesn t seem to be a symptom. I am having a reaction to this medication or is there something different going on?