This rather simple condition can be described as an overlapping of the cornea by loose nonedematous conjunctiva. This occurred in a 15-year-old girl, was inferiorly located, and represented a cosmetic blemish, particularly when looking straight ahead and in downward gaze. There was no overlap in upward gaze (Fig 1 to 3). Allergy or thyroid disease were not factors. It is the only case that I have seen.
Surgical correction consisted of a simple excision of an elliptical section of conjunctiva just above the inferior rectus muscle insertion and a uniting of the cut edges by passing the sutures through episcleral tissue thus fixing the loose conjunctiva so that it will no longer slide upward (Fig 4).
Pinkerton OD. Bulbar Conjunctivo-chalasis. Arch Ophthalmol. 1972;88(5):532. doi:10.1001/archopht.1972.01000030534013