選択的
accuracy
aid
alphabet
background
black
business
chart
closeup
concepts
differential
doctor
effort
equipment
exam
eye
eyesight
eyewear
glass
glasses
healthcare
human
improvement
letter
life
loop
magnifier
magnifying
medical
medicine
nobody
office
optical
optician
optometrist
part
patient
people
perception
person
sensory
sight
snellen
test
text
transparent
typescript
visual
western