I have heard that high blood sugar can contribute to glaucoma and other eye problems. Glaucoma runs in my family as a dominant trait. I have recently been diagnosed with borderline high intraocular pressure but there are no signs of damage to my peripheral vison yet.
My corrected vision has improved from 20/20 to 24/20 since eating primally. My sister has always been better than 20/20 and never needed correction.
I am only moderately short-sighted (first needed glasses in my early twenties from eye strain reading small-print biochemistry journals) but have always been able to focus much closer than normal at around 10 cm. I currently work at a computer for most of the day. I was born with the ability to focus on and follow faces around me which, according to my parents, seriously freaked out the medical staff as they'd never seen a case of it before.
I have to take my glasses off to read, otherwise I experience eye strain. I have been making an effort to put my glasses on a few times a day at work (in addition to loo breaks and going to make a coffee), and looking out of a window to focus long distance. I'm sure that's helped as a muscle workout in improving my corrected vision. I pretty much only wear glasses for driving, walking outdoors ( I sometimes remove them during the winter to increase exposure to sunlight), visiting the theatre and watching films on TV/at the cinema.
My colour vision has become more pronounced with increased consumption of coconut oil. I adore strong colour and contrasting colours, and am a very visual person, so this makes me very happy.
F 5 ft 3. HW: 196 lbs. Primal SW (May 2011): 182 lbs (42% BF)... W June '12: 160 lbs (29% BF) (UK size 12, US size 8). GW: ~24% BF - have ditched the scales til I fit into a pair of UK size 10 bootcut jeans. Currently aligning towards 'The Perfect Health Diet' having swapped some fat for potatoes.