Have you ever felt a little queasy when you're watching an action packed 3D movie? There may be a medical reason behind it.

Vision researchers in Oregon enlisted adults of various ages to watch the same movie in both 2D and 3D. They sat at different angles and distances. 21-percent of participants reported vision and motion symptoms while watching the movie in 3D, compared to just 12-percent with 2D viewing.

Symptoms related to 3D viewing, like double or blurred vision, dizziness, disorientation and nausea, were affected by where the participant sat and their age. Younger viewers who really got into the film suffered for it. Sitting right in front and looking straight ahead caused the most motion sickness. Older viewers actually had more visual and motion sickness symptoms in 2D viewing.

The good news: symptoms can be reduced if you sit farther back from the screen, and at an angle.

I'm Dr. Cindy Haines of HealthDay TV, with the news from today that can lead to health tomorrows.