According to a new Australian study published in the journal Optometry and Vision Science, headstand (Salamba Sirsasana), among other things, may lead to glaucoma and short-sightedness if you are already at risk for these conditions.
Professor Charles McMonnies, from the University of New South Wales School of Optometry and Vision Science, said, "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. Pressure spikes are fine if you have healthy eyes. But all the people out there with these conditions, and so many others at risk of them, can be negatively affected, and many don’t know it.”
It seems the trick is knowing if you are at risk. Will you keep on doing headstand or does this study make you a bit wary?