cataract disease results in opacification of the lens.
In the absence of cataracts, in a patient who does not have vision defect, the lens is transparent.
Thanks to the phenomenon of accommodation of the lens, close vision is made possible, even if the object is close to the eye, by modifying the angle of curvature of the lens.
Cataract is the loss of transparency of the lens, which transmits images less well.
Cataract blurs the perception of images and colors and is responsible for a progressive decline in vision.
Cataract disease can be congenital – hereditary, traumatic – following a shock to the eye, or secondary to serious infections of the eye.
But it most often appears gradually with age due to the natural aging of the lens.
Certain factors are nevertheless capable of aggravating or accelerating the disease: exposure to ultraviolet rays, smoking, alcoholism, diabetes and certain treatments (prolonged corticosteroid therapy) and metabolic diseases.
