Iris prolapse is not an uncommon occurrence during cataract surgery. It usually occurs through
the main incision during hydrodissection and is commonly associated with floppy-iris syndrome;
however, it can manifest in cases with no known predisposition and can occur at any stage during
surgery. The mechanism is explained by the Bernoulli principle and its effect on iris position during
the movement of fluid within the eye. Predisposing factors are iris configuration, anterior chamber
depth, and position and architecture of the corneal tunnel. Strategies for prevention and management
include the use of pharmacological agents, ophthalmic viscosurgical devices, and iris retractors.
These strategies can be augmented by alteration and adaptation of the surgeon’s technique.
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