Is it worth me getting gles?

Its a very mild perscription but if you are suffering from eye strain then its probably worth you trying. Get the perscription made up cheaply on line to see if it works for you. Then if it does help you can look at getting a better more expensive set. I do find that working on computer screens/reading even small changes in perscription the optiican says doesn't matter makes a different to comfort and eye strain.