I love science in Sports.

Josh Hamilton, has new contacts for day games and its not about his actually vision.
He is wearing them to block the amount of light his eyes absorb in sunlight which increases the glare.
This is a subject we have discussed in our past on vision and the effect on sports.

Two years ago, during my year long eye infection, I spent way too much time discussing and reading about the clarity differences with my specialist.  The idea that I had returned to 20/10 without clarity was driving me nuts and my doctor gave me a diatribe on what had happened.

  My only way to describe the difference, is I was used to HD not regular TV clarity, I could see to my previous vision on an eye chart, but it was just not what I was used to. 

Under the sun this season, Hamilton's numbers are dim. He is batting .122 (6-for-49) with no home runs, four RBIs and eight walks. He also has 17 strikeouts and a .429 OPS..
At night, it's a different story. Hamilton is hitting .374 (41-for-109) with six home runs, 28 RBIs, seven walks and a 1.076 OPS. And he only has 14 strikeouts while playing under the lights.

During his 2010 MVP season, the blue-eyed Hamilton hit a respectable .286 during the day and .384 at night.
I would like to see a survey with Brown eyed people vs Blue eyed people at night.
It would be interesting to know if Blue Eyed people hit higher than Brown eyes on average.

His eyes will look red when he wears them.   That will be on every Channel of sports tonight.
The media is hammering him on this issue, quoting numbers from the old days. 
Just something to consider.
http://sports.espn.go.com/dallas/mlb/news/story?id=6696741
J.