YOU SAID:

i saw the sign and it opened up my eyes

INTO JAPANESE

私は看板を見て、それは私の目を開いた

BACK INTO ENGLISH

I saw the sign and it opened my eyes

INTO JAPANESE

看板を見て目が開いた

BACK INTO ENGLISH

I opened my eyes when I saw the sign

INTO JAPANESE

看板を見て目を開けた

BACK INTO ENGLISH

I opened my eyes when I saw the sign.

INTO JAPANESE

看板を見て目を開けました。

BACK INTO ENGLISH

I looked at the sign and opened my eyes.

INTO JAPANESE

私は看板を見て、目を開けました。

BACK INTO ENGLISH

I looked at the sign and opened my eyes.