the heme-iron from the meat he's eating is effecting his liver wich is inturn effecting his vision
glasses tend to be the go to method among people who seek others to help them when they give up on there own
however carrot juice and other foods flush out the liver toxins and rejuvinate it nuturing other organs as well but its hard to nuture the other organs because of the influx of all that heme-iron wich weakens the liver direction, totally contradicting the effect of a carrot juice
Thats why I bought a juicer... Carrot and Kale juice.. Good stuff... Flushes out some damage caused by booze..