Related Clues:

• Keeps tabs on
• Socket contents
• Some are behind glasses
• Potato buds
• Beholds
• They're protected by lids
• Argus's hundred
• They're all in your head
• Colon in many an emoticon
• Buds on spuds
• Glimpses
• Choice meat cuts
• 'Mona Lisa' features that 'follow' the viewer
• Argus had 100
• "Windows to the soul"