eye ‧ sight /ˈaɪsaɪt/ BrE AmE noun [uncountable]
your ability to see SYN vision
poor/good/failing etc eyesight
Eagles have very keen eyesight.
He had a problem with his eyesight.
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COLLOCATIONS
■ adjectives
▪ good
Your eyesight must be very good if you can read the sign from here.
▪ keen (=extremely good)
Eagles are known for their extremely keen eyesight.
▪ perfect
She's in her seventies, but her eyesight is still perfect.
▪ bad/poor
Moles have very poor eyesight.
▪ failing
In his later years, he suffered from failing eyesight.
■ verbs
▪ somebody's eyesight fails
He's over 80 now, and his eyesight is beginning to fail.
▪ somebody's eyesight gets worse/deteriorates
Your eyesight gradually deteriorates with age.
■ eyesight + NOUN
▪ eyesight problems
Her eyesight problems ruled out a job as a pilot.
▪ an eyesight examination/test
The cost of the eyesight examination may be refunded.