Something used to see

Words referring to glasses and other things people use to help them see.

• What words refer to things people use to help them see better?
  lens eyepiece optical instrument prism sight gun sight bomb sight scope viewer
• What words refer to glasses?
  glasses eyeglasses corrective lenses contact lens bifocals spectacles specs monocle
• What things do people use to see small things?
  microscope magnifying glass magnifier
• What things do people use to see things far away?
  telescope binoculars field glass
• What things do people use to protect their eyes?
  sunglasses dark glasses goggles
• What do these things do?
  enlarge reflect focus