Related Clues:

• Publican's measuring device
• ___ disc (blind spot)
• Changed topic concerning the vision
• Dispenser of Dutch courage (nerve of sorts)
• Eye related
• Spirits measurer
• Concerned with pupils, say
• Connected with the eyes or vision
• Pensioner ignoring a twitching of the eye
• Another topic about the eye
• Like a loupe
• Cop it out of sight
• Visual showing humour? Don't start that!
• Regarding vision
• Ophthalmic