I have been having headaches and eyestrain problems recently I thought it was because I had bin using the computer a lot so i went out and got a screen filter them I noted I was unable to read number plates at a distance so I booked an eye test the optician did all the tests and told me I had a astigmatism so I need glasses I pick them up tomorrow

i had to look up what the hell Astigmatism is this was one of the
clearest answers i gothttp://www-staff.lboro.ac.uk/~huph/astig.htm