Re: Is this true!?
Well, the current context is facing someone experienced in taking you to the ground, and mounting you. In that context, poking that someone in the eye, is not a high percentage option.
If it's someone who miscalculated when assessing you as an easy victim, and made a stupid attack (happens at least a bit I'd think), then yes, perhaps the odds of poking them in the eye go up a bit. I'd prefer to have a little something more in the arsenal, though...