Hello, hello.

I like Leigh's correction with exception for this line: "My eyes are painful."

It doesn't make sense. I guess you can say either:

1. My eyes hurt because...

2. My eyes are in pain because...

3. My eyes are sore because...

Good luck! :)

My eyes are painful.

My eyes are painful because I did used a PC for a long time.
I hope to go home early tomorrow.

目が痛い。
今日は長時間パソコンを使ってたから。
明日は早く帰りたいな。