Playing video games can alter the visual perceptions of gamers, a study has found.
Researchers at Nottingham Trent University looked at the after-effects of playing video games.
The study found many gamers saw distorted versions of real world surroundings following play.
Some reported seeing video game menus 'pop up' in front of their eyes while in conversation with friends, while others said they had seen coloured images and HUDs (head-up displays) when driving.
Others struggled to sleep while some suffered flashbacks after game play.
The study, led by psychologists Angelica Ortiz de Gortari and Professor Mark Griffiths, looked at gamers' perceptual experiences.