If you blink often, you might or might not have eye issues. If it doesn't turn out to be dry eyes, then it could be due to nervousness and stress. If this is your problem, relax. If you don't think that it's a tic, see an ophthalmologist.
Do you use the computer often, either at work or at home? Looking at the computer screen can be damaging to your eyes, causing blurry vision, strain, headaches and even back and neck pain. Keep your eyes safe by resting them every 20 minutes. Simply look off into the distance for about 20 seconds. Make sure you take a break from your work every hour or so as well.