good find. it's pretty simple though really. I mean the eye is essentially a muscle. exercise it and target the right parts and it will perform better. however, there is always a peak. I mean say you're talkin about an average man working on his bench press. The more he works out the stronger his chest will be until he reaches a certain age in which he stops making gains and naturally loses the strength with age but then again not at the same rate as someone who didn't exercise? hope that made sense..