[quote=The Traveler of Realms]
Rai-For a couple of reasons. First it makes it so that it has to be actively restrained, rather than oh I want to activate this so I will. If he were to keep his eye open he would be constantly in the infant stage, until he passed out from chakra exhaustion. In addition it is used as a balancing factor. Originally this KG was going to be used with a genin. Having to keep his eye closed would make it so that his field of vision would be limited, and his depth perception would be off. Daisuke is much older, and as such has gotten used to these side effects. Besides that would do you think of him?[/quote]

Your reasons are bad. It's functionally exactly the same whether it needs to be activated or turned off; anything that can force you to do one can force you to do the other. And if your depth perception is that off because you have an eye closed, you should probably not be considering a career as a ninja. :/

[quote=Nero]
Honestly, you're being needlessly picky.
[/quote]

I wouldn't say 'needlessly'.