Related Clues:

• Glass squares
• You can see right through them
• Sheets of stamps
• Glazier's units
• Window divisions
• Optician's wares
• Microscope parts
• They may be corrective
• Shutterbug's choices
• Window shopper's buys?
• Frame inserts
• Window inserts
• Glasses in eyeglasses
• Windex targets
• Contents of some frames