Possible Clues:

• Eye window
• Eyeball membrane
• It's not all my eye; it's more of an old joke, by the sound of it
• Outer covering of the eye
• Ear? Then again, not quite - it's part of the eye
• I sound a bit more grainy
• Part of the body first successfully transplanted in 1905
• Coat pupils should wear?
• You see through it
• What a contact contacts