All IOLs have a central optical zone, with peripheral "legs" (called haptics) that secure the lens implant inside the lens capsule.The primary difference between a conventional monofocal IOL and an accommodating IOL is the design of these haptics.In a normal eye (without presbyopia or cataracts), this dynamic process of accommodation adjusts the focusing power of the eye by changing the thickness of the eye's natural lens.When the ciliary muscle is relaxed, the lens flattens to enable clear distance vision.In this fashion, an accommodating IOL can expand the range of clear vision after cataract surgery, providing better near vision without eyeglasses than what is possible with a conventional monofocal IOL procedure.The Crystalens IOL and the Trulign Toric IOL are very similar in design and both correct presbyopia.The first step is to assess the child's abilities and the environment where the child will be spending time. Once the goals and objectives are identified and expectations for the child's participation in that environment are established, the team selects or creates adaptations and accommodations that address those needs.
Though Crystalens and Trulign Toric accommodating IOLs provide an expanded range of clear vision compared with conventional monofocal intraocular lenses, you may still need reading glasses to comfortably see small print and perform other near vision tasks.
As the eye ages, the lens becomes less flexible, causing the loss of near vision that is the hallmark sign of presbyopia in people over age 40.
During cataract surgery, a circular opening is cut in the anterior part of the lens capsule so the surgeon can remove the eye's natural lens that has become cloudy. The peripheral and posterior portions of the lens capsule are left intact, forming a partially open "bag" that the intraocular lens is positioned within to restore focusing power to the eye.
That said, most people who choose one of these accommodating IOLs are very pleased with the greater freedom from eyeglasses they have after cataract surgery.
Another type of presbyopia-correcting IOL that is an alternative to accommodative IOLs is the multifocal IOL category.