The blurry vision after using camera may be caused by the long time use of the camera which causes your tiredness in the eyes. You should close your eyes and have the good rest for your eyes. You could also use some eye drops to make your eyes feel comfortable and get the clear vision quickly. You must relax yourself and have the good rest for yourself.
It sounds really strange. I never heard that using camera can cause blurry vision. Are you spend too much time focus on the camera? If so, it is normal. You know, spend too much time focus on a point can make eyes tired easily. And if you got tired eyes, you may suffer blurry vision, double vision even eye ache. If so, you will be better after taking a rest. If you still feel blurry vision after rest, you'd better consult an eye doctor.
Generally speaking, blurry vision is one of the signals that indicate your eye problems. You have been taking photos for much too long in a time, which might lead to some eye strain or fatigue, thus, blurry vision would arise. So it is only a matter of time before you recover if you take some breaks and eye drops. Anyway, try not to do that again in the future and make proper use of your eyes.