So I thought I would conduct a little home movie experiment because I could.
The copy of the Coraline DVD I purchased on Black Friday (Walmart $3!) included a 3D copy with glasses. So... I dimmed the lights and passed out glasses and we watched. She made it less than 20 minutes into the film before asking if we could "switch to the one without the 3D".
Why? Because it was blurry and hurting my head. Oh, and the glasses were too big (hence the headband).
PS. Coraline - a bit too scary for my daughter. Also, maybe not the best for kids with eye issues as it features a scary ghost mom that pulls out eyeballs and sews buttons in their place.. yes, really. Gotta 'love' Tim Burton. Creepy!