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However, the lenses remained too expensive for many cataract patients. In 1995, Ruit developed a new intraocular lens that could be produced far more cheaply and which, as of 2010, is used in over 60 countries. [13] Ruit's method is now taught in U.S. medical schools. [3]
Cataract surgery is the most common application of lens removal surgery, and is usually associated with lens replacement. It is used to remove the natural lens of the eye when it has developed a cataract, a cloudy area in the lens that causes visual impairment. [4] [10] Cataracts usually develop slowly and can affect one or both eyes. [4]
Posterior capsular rupture, a tear in the posterior capsule of the natural lens, is the most-common complication during cataract surgery. [8] Posterior capsule rupture can cause lens fragments to be retained, corneal oedema, and cystoid macular oedema; it is also associated with increased risk of endophthalmitis and retinal detachment.
This is by far the most common type of implanted lens after cataract surgery, as this is the natural and optimum position for a lens. [citation needed] Anterior chamber IOL (ACIOL). A less-common type of intraocular lens, which is sometimes used if a PCIOL is not an option for a patient or if the situation requires a phakic IOL (PIOL).
In America, cataract couching may have been performed in 1611, [30] while cataract extraction was most likely performed by 1776. [31] Cataract extraction by aspiration of lens material through a tube using suction was performed by Philadelphia-based surgeon Philip Syng Physick in 1815. [32]
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