Table 1.

Types of spontaneous IOL dislocations.

	Early cases	Late cases
Time following cataract surgery	<3 months	≥3 months (even years after uncomplicated cataract surgery)
Pathogenesis	Inadequate IOL fixation within the secure capsular bag	Progressive zonular insufficiency and capsular bag contraction
Predisposing factors	Tearing of the posterior capsule and rupture of the equatorial zonule	Aging, high myopia, uveitis, trauma, retinitis pigmentosa, diabetes mellitus, atopic dermatitis, connective tissue disorders, and previous vitreoretinal surgery or acute angle-closure glaucoma attack