Related Clues:

• Bifocal, for one
• Projector part
• ___ cap
• See 23 Across
• Cell-phone feature
• Pince-nez part
• ''Telephoto'' or ''contact'' ender
• Literally, ''vault''
• You see right through it
• Focusing device
• Cataracts make it cloudy
• Telescope component
• Word with ''ready'' or ''shy''
• Photog's need
• Glasses glass