Related Clues:

• Fiber attachment?
• Measuring device attached to inverted bottles of spirits
• ___ disk (spot on the retina)
• Type of lens or nerve
• Surgical procedure overcoming twitching of the eye
• Alcohol measure for your eyes only?
• Type of modern fiber
• Concerning eyesight
• Instrument lens
• Not opening, funny eye
• In photographic jargon, a lens
• Awkward topic for one on the bottle in the pub
• Funny when Jack leaves mince pie
• The 'o' of Verizon's Fios
• It measures spirits of subject as temperature drops