The woman had not complained about problems other than cataracts, according to the report Morjaria and others published in the British Medical Journal.
SFGate quoted Rupal Morjaria, a specialist trainee ophthalmologist as saying, "It was such a large mass - all the 17 contact lenses were stuck together".
The patient's cataract surgery was postponed due to increased risk of infections, and she was treated with antibiotics.
A surgical team was able to remove all 27 lenses.
The patient was 67 years old and had been wearing contact lenses for 35 years.
For anyone who needs them - wearing contact lenses quickly becomes part and parcel of your everyday routine.
"She was quite shocked, Morjaria said".
Two weeks later, the patient came back and told Dr. Morjaria that she felt a lot better. So I have no clue how this woman managed to stick 27 contact lenses in her eye.
Doctors initially found a "blueish mass" of 17 lenses stuck together, and then found another 10.
'It was such a large mass. However, when the doctors went to perform cataract surgery at Solihull Hospital in England they discovered the mass wasn't cataracts at all.
Morjaria advised for the public to undergo regular checkups, and to take more precaution when using contact lenses. She had not reported any symptoms that could be linked to the missing lenses.
Association of Optometrists clinical and regulatory officer, Henry Leonard, told OT that the case illustrates the importance of contact lens wearers having regular professional after care.
She added, "Because she had harboured these contact lenses in her eye for an unknown length of time, if we had operated she would have had a lot of bacteria around her conjunctiva".
However, the senior citizen brushed it off as she thought it was due to her dry eyes, and her old age.