Well many years in IT certainly played havoc with my eyes, but I get less headaches since I left IT.

At first I admit I took the panic road and got my first auto-focus camera.

Then I found I only needed to use my glasses to see the F stops and speed. Alternatively if the information is displayed in the viewfinder I didn't need to wear my glasses.

Interestingly for me I've found I shoot better pictures without my glasses as I see the lines and form better without needing the detail. Once I have the negative I can see the real details within the picture. So usually I now put my glasses in my pocket when out prowling for the street shots.