french blinkers for xc?

[langside]

any views good or bad?
looking to improve consistency to locking onto a fence
any alternatives too?

 

[Gamebird]

I've started using them recently with a noticeable improvement in concentration.

 

[samp]

Be cautious wearing them, I took my mare that tended to nap and vertical rear to a XC clinic in them and they just sent her into a blind panic/ bolting thing, as soon as they were removed she was a lot calmer