Since LED lights are becoming prevalent, you should investigate the characteristics of the different LED lights available. For example it is crucial that the blue frequency close to ultraviolet around 400nm is suppressed by the manufacturer; it is easy to find out with serious manufacturers like Nichia who publish the detailed characteristics of their lights in PDFs full of scientific graphics, but probably impossible to know with lights designed in China. Do you know the precise characteristics of the LED light you used ? CRI ? Color temperature ? Lumens ? Spot, floody or flood ?
You should read this:
http://lowvision.preventblindness.or...e-light-hazard
Some tips : lower the contrast as much as possible on your screen and increase the luminosity to compensate. Use a software like Redshift and set it between 2700K and 5500k. Prevent the light from the windows from directly reaching your eyes, even from the sides. Illuminate your room precisely to prevent a strong contrast between your screen and the space around it.
I have read that surgery for myopia increases the probability of your eyes aging at a younger age than most people.