Related Clues:

• Iris' place
• Word after red or dead
• Twinkling thing
• Knack for design
• Blinker, with 24-Across
• Hole in Swiss cheese
• This has a pupil, but no teacher
• Part of REM
• Teardrop's starting point
• It has a ball
• "___ of the Beholder" (1999)
• Survey closely
• Where the uvea is
• Site of rods and cones
• See 56 Across