is common it can be due to tiredness of your eyes after long watching of tv or reading, it can also be due to any infection
, posterior vitrious detachment, retinal detachment
, vitrious haemorrhage, etc,if you don't have any underlying cause then you can do following things, first of all relax your mind and your eyes for atlst half an hour daily, move your eye ball round and clockwise and then anti
clockwise and repeat the same 20-30 times, hold any object like a pen in front of your eye as far
as you can and try to focus on it and slowly bring it towards your head atlst 6 inches away and again repeat the same 15-20 times atlst, massage your temple region and put a cloth soaked in warm water over your eyes, take plenty of water, take food having high antioxidants like blueberries, oranges, pomegranate, pears etc, take sea fish, take a sound sleep, relax your mind, take high protein.