The "O" sign presentation of a lost rigid contact lens
Srinivasan Subramaniam FRCOphth
,Naresh Joshi FRCOphth
and Luke W Membrey FRCOphth
Reproduced with kind permission of Contact Lens and Anterior Eye
A 47-year-old lady was
seen with a swelling of the right upper lid of 4 months duration.
She was a rigid gas permeable contact lens user. Examination revealed
a smooth lump in the right upper lid. Eversion of the lid revealed
a small opening in the conjunctiva; nothing could be seen within
the opening (Figure 1).
Under anaesthesia, the right upper
lid was everted and the conjunctival opening extended. A contact
lens was expressed along with mucopurulent material (Figure
2).
No organisms were cultured from either the mucopurulent
material or the contact lens. The patient made an uneventful recovery.
Periocular migration of hard contact lenses is well
recognised.1-4 The finding of a hole in the conjunctiva, the '0'
sign over an embedded contact lens has also been described.5 Patients
presenting with an upper lid lump and a conjunctival defect '0'
sign should be questioned regarding contact lens wear.
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