1. (

• eyecup ,
• eyebath ,
• eye_cup

) a small vessel with a rim curved to fit the orbit of the eye; use to apply medicated or cleansing solution to the eyeball; "an eyecup is called an eyebath in Britain" ;

2. (

• optic_cup ,
• eyecup

) (embryology) a two-walled cuplike depression that develops into the pigmented and sensory layers of the retina ;