The 30-year-old Tolleson underwent Lasik eye surgery in 2009 and had perfect vision for the past several years. He began experiencing some issues a couple of weeks ago and the problems became more severe when he tried to use contacts.
"[The doctor] said he'd only seen this one or two other times and they were both with previous Lasik patients," Tolleson said. "It seems that people after they have Lasik just can't wear contacts.
"So it was a very small vision correction anyway, even debatable whether I would wear glasses or not with it. It's just the contacts that I wore for those three days just irritated it and caused a reaction and that's what happened yesterday."
Tolleson plans to have Lasik surgery again this offseason but for now will wear glasses. He's not sure if that will be the case for the rest of the season or for a few days until his current eye issues completely go away.
The native of South Carolina was available to play Thursday night against the White Sox, and played the final three innings at third base, going 0-for-1 at the plate. He can now officially breathe a sigh of relief knowing that the blurriness he experienced this week isn't related to a serious health condition.
"[The doctor] told me it will take 24 hours to get it all the way back to where it was before," Tolleson said. "He said, 'Don't worry about it, it will come back.' That was good words to hear because I told [manager John Gibbons], I was scared about 5 or 6 o'clock yesterday because it was something I had never experienced before.
"It is definitely night and day better than it was yesterday. I took BP in these glasses today and ground balls and it wasn't an issue. Hopefully, the next few days I'll be back to normal."
Gregor Chisholm is a reporter for MLB.com. Read his blog, North of the Border, and follow him on Twitter @gregorMLB. This story was not subject to the approval of Major League Baseball or its clubs.