My age is 22. My vision was perfect when I got it checked last year. For past 2 months, I used laptop extensively for my college project. I study computer engineering due to which I have to do a lot of close work. Recently I noticed difficulty in reading the blackboard during lecture. I got it checked and optometrist found both my eyes to be - 1.0 D. My question is does close work causes myopia and if yes, then isn't - 1.0 D a little high?