英文關鍵字
adult
aged
astigmatism
cataract
cell
cellphone
communication
confusing
degeneration
difficult
disbelief
elderly
farsighted
focus
glasses
grandpa
happy
holding
letters
macular
male
man
mature
men
mobile
modern
old
people
person
phone
portrait
pupils
read
retired
retirement
satisfied
see
senior
smart
smartphone
smile
strain
technology
telephone
test
vision
white