IMHO…eye strikes are only meant to create a moment to either run or launch a barrage of strikes. if you are facing off and try eye strikes then GOOD LUCK. but an eye strike if done fast enough can be the saving grace for a female in danger or a more non confrontational male. The eyes are pretty sensitive and if struck it will impair your ability to see allowing an opening for you to do SOMETHING…run or fight back.
People have been hit in the face and had an eyeball popped out. a thumb in the eye during a strike isn’t always a lucky punch. if your hands can touch someones face, you can start jamming fingers in their eyes. you may not dig out an eyeball but the pressure of having it violently pushed in is pretty effective in creating an opening.
but eye strikes unless you stab him in it won’t be an effective finishing strike.
On the other hand, not all fights outside the ring are against TRAINED FIGHTERS.