Keep a distance of 8 to 10 feet between your eyes and TV.
See TV in sitting posture and TV should be below head level.
Blink your eyes frequently while watching.
Continuous TV watching is harmful to eyes.
Dont put lights off. Keep the room lighted from behind.
Keep color & contrast low or medium.
Fast changing scenes (frames ) strain your eyes too much.
Late night TV watching should be minimum.