Upon Locating A Darted Deer, One Of The First Things Researchers Do Is Lubricate The Deer’s Eyes With Drops. The Drugs Used To Sedate The Deer Completely Immobilize Its Muscles, Even The Muscles That Open And Close The Eye Lids. As A Result, The Deer Can’t Blink, So The Researchers Use The Drops To Prevent The Eyes From Drying Out While They Are Working On The Animal.