Optometrists say that as many as one in four viewers has problems watching 3D TV.

The next big thing in TV has been slow to catch on among TV buyers — and apparently one big problem is that it makes some viewers queasy.

Optometrist Roger Phelps says viewers who suffer the most with 3D are those who have trouble getting their eyes to converge properly in normal life.

“If you tend to get carsick easily, you might be one of those,” Phelps says.