YOU SAID:

I saw the signs, and it opened up my eyes !

INTO JAPANESE

看板を見て、目を開けました！

BACK INTO ENGLISH

I saw the sign and opened my eyes!

INTO JAPANESE

看板を見て目を開けた！

BACK INTO ENGLISH

I opened my eyes when I saw the signboard!

INTO JAPANESE

看板を見たら目を開けた！

BACK INTO ENGLISH

I opened my eyes when I saw the signboard!