The 'pupil snap' sign of posterior capsule rupture with hydrodissection in phacoemulsification.
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D000368:Aged; D004210:Dissection / Q000009:adverse effects* / Q000379:methods; D006801:Humans; D007903:Lens Capsule, Crystalline / Q000601:surgery*; D008875:Middle Aged; D018918:Phacoemulsification / Q000379:methods*; D011680:Pupil / Q000502:physiology*; D012421:Rupture