Bruce Lee Was Short Sighted I wouldn't worry too much about wearing glasses. I too am short sighted and been practising jujitsu so six months. I never got into the contact lense thing so I only wear my specs to observe the wazas. I always take them off for practice or sparring. I believe that if possible you should train without specs as if you did get into a fight your specs would be the first thing to go. I saw a show on Uk Bravo channel and there was this blind dude who practised Kung fu.