Phacoemulsification is a modern technique for cataract surgery during which the clouded intraocular lens is removed. The posterior capsule is left intact and the artificial intraocular lens is placed within it. Some cells remain on this capsule and might continue producing lens fibres. These fibres form pearls on the posterior capsule and cause the so called “secondary cataract”. When these tiny particles make a film it blocks light and this causes a secondary blurring of vision. This condition occurs in 30-40% of patients after cataract surgery.
The cataract is one of the main reasons for blindness in the world. The only radical treatment is through surgery. This is the most frequently done eye surgery. The basic issue after it is to achieve the best recovery of the patient’s eyesight. For a long time the clouded lens used to be removed with the capsule. This type of surgery is called intracapsular cataract extraction. After such a procedure patients have to wear high-dioptre spectacles (+10 dioptres) which leads to distorted images. A revolutionary discovery in this field is the invention of intraocular lenses which are implanted in the place of the natural opacified lenses. The first IOLs copied the shape of the natural human lens but with time they were refined and evolved into the contemporary sophisticated implants. They comply with high requirements for biological compatibility with eye tissues, they are easily implanted, transparent and able to focus light on the retina the way natural lenses do. The images are identical with those perceived by natural lenses.