機器
black
care
circular
clinical
device
dial
doctor
equipment
exam
examination
eye doctor
eye test
eyesight
focus
gauge
glasses
health
instrument
knob
lens
medical
medicine
metal
number
office
ophthalmic
ophthalmologist
ophthalmology
optical
optician
optometrist
optometry
phoropter
post
science
silver
steel
technology
test
tool
vision