英文關鍵字
adult
aged
aging
astigmatism
cataract
cell
cellphone
communication
complicated
confusing
degeneration
elderly
eyeglasses
eyesight
glasses
grandpa
happy
holding
letters
macular
male
man
mature
mobile
modern
old
older
people
person
phone
portrait
read
retired
satisfied
screen
senior
sight
single
skeptical
smart
smartphone
squint
technology
telephone
test
using
vision
wrong