She thought she dropped it 28 years ago, but it was not like that.
Doctors from Dundee, Scotland, made the strange discovery when the 42-year-old patient was told because his eye was swollen.
Doctors found that a contact lens was submerged in a cyst that had mysteriously formed after more than a quarter of a century.
When he was 14 years old, The woman had a slap in the eye with a pen or a shuttle (with which badminton was played) and assumed that the lens had come loose after the collision.
The unusual case appears in the medical journal The BMJ.
Ninewell hospital researchers performed an MRI after the patient's GP had referred her to the Ophthalmology Department.
The patient presented with swelling and ptosis of the left upper eyelid (c When the eyelid falls, explain the doctors Sirjhun Patel, Lai-Ling Tan and Helen Murgatroyd.
The images of the resonance revealed an ovoid cyst of about 8 mm long, but there was no evidence that there was anything in the vicinity
When the surgeons removed the thickening that had caused the swelling, the cyst broke open the lens.
"In one Another interrogation reminded the patient's mother that her daughter had a history of blunt trauma to the eyelid, in the upper left when I was a girl, "Dr. Patel and colleagues wrote.
" The patient was hit in the left eye with a steering wheel while playing badminton at the age of 14. "
" The patient He was wearing a gas-permeable rigid contact lens that he could never find again. "
" It was assumed that the contact lens had the eye abandoned and was v erloren. "
the article Donkey, experts explain that the woman, whose identity is not mentioned, after the incident had an inflammation in the eye, but that the inflammation was successfully treated by her general practitioner.  The patient has never used contact lenses again gas-permeable after the accident.
"We can conclude that the rigid gas-permeable lens migrated to the left upper eyelid of the patient at the time of the trauma and was in situ for the past 28 years, "the specialists added.
The team added," The migration from a rigid gas-permeable lens to the eyelid is a rare cause of inflammation of the eyelids. "
" Spontaneous migration of a hard contact lens on the eyelid is a relatively well-known occurrence, but we could only find four reported cases of secondary lens migration due to significant trauma. "
" The report in this case shows the time period mpo extended longer between the traumatic migration of the gas-permeable rigid lens to the eyelid and the appearance of swelling of the eyelids, "they said.