Going to the gym, playing an instrument, doing yoga may be beneficial to your mind and your body, but could be harming your vision, Australian researchers report.
"Yoga head stands, weightlifting, sleeping face down, playing instruments like the trumpet and swimming laps are some of the many ways of causing eye pressure spikes," Professor Charles McMonnies, from the University of New South Wales School of Optometry and Vision Science, told the Australian Associated Press.
Pressure spikes to the eyes may cause conditions like glaucoma, a leading cause of vision loss, and near-sightedness.
For his study, McMonnies tested the pressure effects of eye-rubbing and other activities, according to the report.
Eye-rubbing caused the biggest spike, raising eye pressure to 10-times normal levels. Even so, the act may be harmless if it is only done occasionally, according to the study published in the journal, Optometry and Vision Science.
The risk of vision loss may be higher for activities carried out regularly and for long periods, like wearing goggles while swimming lengths.