>>275536462
If it's only blurry when you look down, it's definitely too loose. Mine moves a little when I look down, but it's comfortable the way it is, so I haven't messed with it in a while. Valve has a guide on adjusting it which I wish I'd found when I was first trying to get everything dialed in. Spam filter is keeping me from posting it, but searching for Valve Index Fit Guide should give you the right page.