hii Mr Ramani
The cobwebs are a age related transformation of the vitreous jelley in the eye. this is something like the hair setting gel that we all routinely use.
as i said, its an age related transformation. when this thing happens in the center of the eye, then you will notice it. after some time, this jelly moves and the cobweb on its own disappear.
there is no need to treat the same. if you are too much symptomatic, then u can undergo a vitrectomy
to remove the bad jelley. but its like killing an ant with a grenade. so your call.
and dont worry. it almost never causes a total cobweb formation.
get well soon.