fog is on of the phenomenas we see if our outer spherical lenses disrupt, a procedure with many different phenomenes like quickly appearent oftly sidely lights like flashes, the always same picure when applying pressure with hand on closen eyes, the vision of the surface of our own eye with all this tear-swimming little things, normally relatively close can be seen in a very greater distance, it seems to change from perhaps an fracture of an inch or just an inch upto an good european Meter, seemly, because the disrupture is in the range of fracures of Millimeters perhaps, or an twenthiest of an inch.