Eye lens replacement accommodating
They are often referred to as "premium" lenses because they are multifocal and accommodative, and allow the patient to visualize objects at more than one distance, removing the need to wear eyeglasses or contact lenses.Premium intraocular lenses are those used in correcting presbyopia or astigmatism.ECCE utilises a larger incision (10-12mm) and therefore usually requires stitching, and this in part led to the modification of ECCE known as manual small incision cataract surgery (MSICS).Cataract extraction using intracapsular cataract extraction (ICCE) has been superseded by phaco & ECCE, and is rarely performed.Cataract surgery is generally performed by an ophthalmologist in an ambulatory setting rather than an inpatient setting, in a surgical center or hospital.Either topical, peribulbar, or retrobulbar local anesthesia is used, usually causing little or no discomfort to the patient.Long term exposure to infrared light and microwave radiation may also lead to cataract formation.
A different model of toric lenses is created by Alcon and may correct up to 3 diopters of astigmatism.
In addition to these age-related changes, infants may be born with congenital cataracts.
Direct ocular trauma and some medications, specifically the long term use of steroids, may also result in cataract formation.
Cataract surgery is the removal of the natural lens of the eye (also called "crystalline lens") that has developed an opacification, which is referred to as a cataract.
Metabolic changes of the crystalline lens fibers over time lead to the development of the cataract and loss of transparency, causing impairment or loss of vision.