as far as the eye can/could see

US /æz fɑr æz ðə aɪ kæn/kʊd siː/
UK /æz fɑr æz ðə aɪ kæn/kʊd siː/
"as far as the eye can/could see" picture
1.

一望无际, 极目远眺

over a very large area; as far as the horizon

:
The desert stretched out as far as the eye could see.
沙漠一望无际
From the top of the hill, we could see fields of sunflowers as far as the eye could see.
从山顶望去,向日葵田一望无际