Takedowns when you have impaired peripheral vision??

A friend of mine posed the following question: 

What kind of standup game (i.e. takedowns, offense and defense, in BJJ-- not MMA!) would you advise for someone with some impairments to their peripheral vision? 

She says it's hard to watch everything all at once-- hands, arms, legs, core-- and hopes for some suggestions.

My first thought was, assuming you have a non-square stance (one foot kind of back), use your rear hand to get a cross-grip on their lead hand/cuff.  That gives you one thing to look for and focus on getting, and by grabbing with your rear hand, you cross them up (preventing them from shooting on you).  If you were reaching with your lead hand, you'd either have to get a same side grip (which leaves you both open to being shot on) or you'd be going for her rear hand (which is tough and leaves you open to a lot.)  I just recently read something on the blogosphere about this and can't recall where, but would be happy to edit to give credit where it's due!

Oh wise readership-- help my friend out!