Back in the late 1800s, an experiment where a scientist wore glasses showed him an upside down image of the world. After some time, he claimed he saw the world right side up. Since then, scientists have been trying variations of that trick.

Back in 1897, George Stratton published 'Vision Without Inversion of the Retinal Image,' about his experiences with a pair of glasses which inverted the world.

The quirks of the optics, plays an image that hits the retina of the eye upside down. The brain will automatically invert it so we see the world the way we do. Stratton, for the first time in his life, saw a right side up image of the world. His brain turned it upside down again, and he blundered around and crashed into things.

After a few days, Stratton was able to adapt and work as normal. He claimed in his paper, that by the end of the experiment. he actually saw the image through glasses as right side up.

Scientists have been trying to duplicate that experiment ever since. The most recent study was conducted in 1999 and published in Perception.

The subjects of the study all adjusted their actions to the upside down world, and did not hwoever, see the world as right side up. They mostly reported feeling as though they had been turned upside down in the regular world. There was never any actual inversion.

But with enough luck, we may just be able to experience what Stratton did. Maybe not now, but soon.

Via The Exploratorium and Wired.