Cataract is one of the leading causes of preventable blindness in the world. Cataract means the loss of transparency of the intraocular lens. The lens is the most important refractive structure of the eye. It allows images to be projected to the retina. It is transparent and veinless so that the light can pass through the image.
There may be cataractogenic development in the lens for many reasons. It can be seen in congenital cataracts in newborns. The most common cause of cataracts in adults is old age. The second place is due to metabolic reasons, especially diabetes. The main complaint of the patients is low vision.
As the cataract progresses, the decrease in vision gradually increases. With cataracts, osmotic changes in the lens can change refraction towards myopia.
The treatment of cataract is surgery. Current cataract surgery is phacoeminpsy surgery. After the anterior capsule of the lens is peeled off (anterior capsulotomy), the surgical procedure is completed by inserting the foldable intraocular lens into the lens capsules, following the refraction and defeat of the lens lucleus and cortex with ultrasonoscopic waves. The current change in intraocular lenses is the presence of lenses that provide vision at every distance to the patient, called trifocal. With these lenses, the patient can have ideal vision in the near-middle-far distance without using glasses.