Third Eye Open may refer to:

• Third Eye Open (Hardware album), 1992
• The String Quartet Tribute to Tool, 2001

• Barney (Barney & Friends character)
• Barney Bear
• Barney Bigard
• Barney Boko
• Barney Bubbles
• Barney calame
• Barney Calhoun
• Barney Danson
• Barney Dreyfuss
• Barney episodes
• Barney Ewell
• Barney Fife
• Barney franks
• Barney & Friends
• Barney & Friends episodes
• Barney G. Glaser
• Barney Glaser
• Barney Google and Snuffy Smith
• Barney Greenway
• Barney Gumble
• Barney Hill
• Barney Kessel
• Barney Kessell
• Barney Martin
• Barney McKenna