background
black
blind
care
character
chart
check
concept
disease
doctor
equipment
exam
examination
eye
eyeglasses
eyesight
focus
glasses
graphic
health
healthcare
illness
illustration
instrument
isolated
lens
letter
look
macro
measure
medical
medication
medicine
optical
read
scientific
see
shape
sight
sign
snellen
symbol
test
view
vision
visual
white