Cataract surgery is the removal of the natural “crystalline lens” that has developed an opacification due to metabolic changes of the lens fibres that over time lead to the development of the cataract and loss of transparency, causing impairment or loss of vision.
During cataract surgery, a patient’s cloudy natural lens is removed and replaced with a synthetic lens to restore the lens’s transparency.
It is one of the most commonly performed implant surgical procedures, the complication rate is very low and visual results great if there are no pre-existing retinal problems.
Intraocular lens (IOLs) usually consists of a small plastic lens with plastic side struts, called haptics, to hold the lens in place within the capsular bag inside the eye. IOLs were traditionally made of an inflexible material (PMMA), although this has largely been superseded by the use of flexible materials. Most IOLs fitted today are fixed monofocal lenses matched to distance vision.
However, other types are available, such as multifocal IOLs which provide the patient with multiple-focused vision at far and reading distance, and adaptive IOLs which provide the patient with limited visual accommodation.