Possible Clues:

• Single eyeglasses
• One-lens eyewear
• Eyepieces for the rich, stereotypically
• Eyeglasses for one eye
• Single eyeglasses held between cheekbone and eyebrow
• Accessories for Mr. Peanut and the Penguin
• Second company rejected investing in development of lens or lenses
• Items worn by 14-, 23-, 39- and 52-Across
• Certain lenses
• Props for the Penguin and Mr. Peanut