So the eye doctor is looking at your eye with the slit lamp microscope and exclames “Oh, you have Kruckenberg’s Spindle!”. To which you reply “What?”.
Kruckenberg’s Spindle is when pigment cells congregate on the backside of the cornea. They are there because of lens zonules scrape pigment cells off the back of the iris and those cells float to the front and become attached to the back of the cornea. Many of these cells can also clog up the drain of the eye causing pressure to rise in the eye. This then can cause damage to the optic nerve and subsequent loss of vision. At that point it is call pigmentary glaucoma. Until then it is called pigmentary dispersion. No need to be alarmed. The patient is just followed once or twice a year depending on his risk.