A disease for tired lens or cataract.

As since long time ago her tried cured, in Ellads as called a dark water as Crete in katarrhaktes  is waterfall, as showed,that vision bad happened in dark liquid is between iris membrane and lens, but on Egypt for preventing cataract are used lotions with wine, milk, pink, nutmeg, as later in a fighting her used drops of iodine kalium.
Surgery used when dark lens squeezed into eye.
As later by Avl Cornelia Tsels on a first half century till our century, as showed a science about cataract, like in effusion in retine, which is thickening,causing vision bad, as and blindness caused a cataract, as not irreversible a blindness that vision loosing, and in glaucoma, and improves a pressure method on cataract, which used till 17 century, but modern oculists are using other approaches and having an effective method curing for cataract, but cataract is any lens darkness, as a changing transparent for a natural lens of our eye will carry as diffusion, spreading character and limiting till a small point darkness and not affecting on the vision, but a most cases darkness lens leads to vision sharpness and quality.