Lutein in blueberries and bilberries is proven to definitely help one's eyesight. Have you got lutein in meat and fat? Yes, I know that meat and fat diet is very good for you. But you're not representative to overall population. The majoraty of people do better adding some carbs like berries to one's diet; but apart from that - meat and fat, of course
Yes, there is lutein in the organs and egg yolks of chickens that eat lutein-containing plants, and animal sources of lutein are actually the most bioavailable (see below), as with most nutrients. My guess is that lutein also could be obtained from the eyeballs and other flesh of chickens and other animals that eat it, since it apparently is in the eyeballs of humans (how else would it improve vision unless it went into the eyes?). Remember, people didn't used to think there was any vitamin C in meat and organs, but now we know better due to the Inuit, Stefansson and others. The quantity of a nutrient in a food is generally less important than its bioavailability. This is why vegetarians have to take vitamin B12 supplements despite there being B12 present in fermented soy products, seaweeds and algae.
I don't know whether people do better with berries in the diet or not. I hope so as I love berries. Do you have evidence to support your claim that the majority do?
Click here: Lutein in chicken liver (see also
http://cat.inist.fr/?aModele=afficheN&cpsidt=17368787)
Lutein in broiler chick livers:
http://www.ncbi.nlm.nih.gov/pubmed/1409229Lutein also accumulates in the spleen:
http://jn.nutrition.org/cgi/content/full/128/10/1802Lutein: Are You Getting Enough of This Anti-Aging Antioxidant Powerhouse?by
www.SixWise.com"Lutein is found in a wide variety of fruits and vegetables, but it appears that
the best source of lutein is from egg yolks, simply because it is more readily absorbed by the body.
In fact, when 10 volunteers ate different sources of lutein (spinach, eggs or one of two types of lutein supplements, each of which provided 6 mg of lutein per day), eggs came out on top. Those who ate eggs as their lutein source had blood levels of lutein that were about three times higher than that of those who ate other lutein sources.
The researchers suspect that other components in the egg yolk, such as lecithin, are responsible for its superior absorbability."
[Note: the lecithin in eggs is different from and superior to that in soy--I do not recommend soy lecithin]