Apart from vision improvement, lutein also work wonders in following diseases :
Distance Vision : Lutein helps in mayopia eye diseases and helps in improving distant eye vision.
Close Vision : Lutein also helps in resolving close eye vision deficiency.
Night Vision : Anyone suffering from night blindness.. can take lutein daily to get relieved from night vision problem.
Color Perception : Lutein also protects you from color blindness.
Age related benefits : We can say Lutein as an anti ageing substance which can be found easily in green vegetables.
Antioxidant : We count Lutein as an antioxidant agent. Also this absorb blue light.
UV Protection : Lutein also increase the skin’s natural antioxidant system and protect against damage from the sun’s ultraviolet rays.
Cardiovascular Benefits : Lutein maintains thickening of the walls of carotid arteries and LDL-induced migration of monocytes to human artery cell walls.
Breast Cancer Prevention : Lutein and zeaxanthin are deposited in breast tissue, scientists have studied lutein intake helps in breast cancer prevention.
You can also see Lutein Food Source.