 [ Symptoms ] after hard phys exercise sometimes get bad tunnel vision and a big ball of light right where i try to focus my eyes why  i have got a heart murmour and my mum dad and all 4 grand parents had diabetes not a good start drama is that after particularly cheeky physical exercise i sometimes get really bad tunnel vision and what seems like a big ball of light right where i am trying to focus feel dizzy and like i have got pins and needles in both hands lasts for about 2 hours then goes back to normal asked the med centre on camp and they have no idea [ Disease ] i am very sorry that you that pain