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Statements about intraocular lenses (IOLs): 1. A rigid PMMA lens needs a larger incision than a foldable acrylic lens. 2. A sharp, square posterior optic edge reduces posterior capsule opacification. 3. Silicone IOLs are preferred in eyes likely to need silicone oil for retinal surgery. 4. A multifocal IOL may cause glare and haloes at night. Which statements are correct?
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