as far as the eye can/could see
as far as the eye can see
Extending to the farthest possible point, as of that which one can see in the distance. Sometimes used hyperbolically, humorously, or sarcastically. I love this part of the country. The green hills stretch out as far as the eye can see. My father was always so proud of his little shop. When I was a boy, he'd take me to the roof and say, "One day all this will be yours, as far as the eye can see."