Related Clues:

• What makes green eyes green
• Light-sensitive eyeball tissue
• Middle layer of the eye
• Part of the human eye
• Makes something of 13 across, as it's in one's line of vision
• Retain faulty eye part
• Reading to sweetheart can initially annoy, as it's in one's line of vision
• Eye layer whose name derives from the Latin for 'grape'
• Eye part with light-sensitive tissue
• Retain complicated part of the eye
• Back of the eye
• Biometric scan target
• Pigmented eye layer
• Layer of the 42-Down
• Light-sensitive layer