A woman from Serbia sees the world upside down because of a rare brain condition called spatial orientation phenomenon.
Bojana Danilovic, 28, has to turn her TV, books and newspapers upside down because her brain does not process images in the normal way.
The council worker's condition means that while her eyes see the world the right way up, her brain then flips the image.
Harvard University experts diagnosed her with spatial orientation phenomenon. Other cases involve people who read or write upside down, but the rest of the world remains the right way up.
"They don't really seem to know exactly how it happens, just that it does and where it happens in my brain," Danilovic said.
"They told me they've seen the case histories of some people who write the way I see, but never someone quite like me."
In order to watch TV, Dailovic watches one television that is balanced upside down, while her family watch another the right way up.
Having had the condition since birth, she said: "It may look incredible to other people but to me it's completely normal.
"I was born that way. It's just the way I see the world."
According to Serbian website Blic, the scientists determined that other than her brain condition, she has no other problems and has above average intelligence levels.
Read this article through Danilovic's eyes