Goji berries are pretty much a staple in my diet. I dunno about improved eye sight but i like to eat aroud 50-75g a day just for the antioxidants in them.
The way i eat them is i'll pour some boiling water into a little bowl of them. Leave it for about 10minutes then drain. Eat with a spoon
Nice and soft!
Aswell i can get them pretty cheap here. There usually on a sale at my local health food shop. 500g for £3-4. somtimes you'll see them half price. I've got a nice little stock pile in my kitchen. Some other shops have 75g for like £2.50. crazy prices!