Pls read the study of "The Influence of Low-powered Family LED Lighting on Eyes in Mice Experimental Model "in life science journal. LED exposure and study groups rule is as following,
The 40 mice were randomly split into four groups (each contained 10 mice), including (1) white family LED irradiation for a consecutive 2-week period (2 hr/day), (2) white LED irradiation for a consecutive 4-week period (2 hr/day), (3) environmental light source with white family LED lamps (the illuminated light of 12-hr light/ 12-hr dark cycle with white family LED lamps), and (4) blank control (no LED exposure).
Histological results showed that the photoreceptor layer is significantly reduced in thickness after 4 weeks of LED exposure 2h every day or LED illuminated environment. That means how long you see the TV, how worse you will get.
This discussion is related to
eye problem.