Blue light retinal injury

Blue light contributes about 90% of the risk of photochemical retinal damage from fluorescent lamps and sunlight, which is why the 
term "blue light hazard" is used to describe this risk. When blue light is absorbed by retinal tissue it induces oxidative stress and the
causes the formation of indigestible debris which accumulates in the outer retina. The cumulative effect of chronic, sub-lethal
oxidative retinal stress and the accumulation of oxidative debris in the outer retina contributes to the development of AMD.

Smartphone overuse may 'damage' eyes, say opticians
March 28, 2014  BBC

What is the macular?

The macular is an oval-shaped pigmented area near the center of the retina of the human eye. It has a diameter of around 5.5 mm. 
The macular is responsible for focusing central vision in the eye, and it controls our ability to read, drive a car, recognize faces or
colors, and see objects in fine detail.

Macula of retina
Wikipedia

Macular Degeneration is NOT curable

In ophthalmology, blue light is a high-frequency light in the violet/blue band from 400nm to 500nm in the visible spectrum. Frequent 
exposure to it can easily cause macular degeneration, which cause permanent damages that can potentially lead to blindness.
UV rays which range from 300nm to 400nm, are the leading cause of eye maladies such as cataract.

What is Macular Degeneration?
American Macular Degeneration Foundation

Blue light is more harmful to those already with myopia

For those that already victims of myopia, staring at monitor screen for an extended period of time creates an even higher risk of
contract. Frequent usage of 3C products will increase the aging of your eyes. Through frequent usage of 3C products, for example,
by the time you are 30 years old, your eyes resemble that of a 70 year old person.

Mobile phone and tablet screens ‘damage eyesight’
Sep 10, 2013  METRO