Eye Protection
"You can chew your food with false teeth; you can even dance on a prosthetic leg (sort of).  But you can't see squat out of a glass eye."
  
Eyes are too easy to lose, and essentially ALL of the people who've lost one or both were NOT expecting to do so.

Wear the right eye protection.  (Chemical splash goggles, usually.)

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"Method Of  Inserting The  Artificial Eye"

         
 (Faceshields in addition to safety glasses or goggles provide even better eye protection in case of.... violence.)

Barry Sharpless story