The first puzzle of the level you will come across two doors one will open while the other shuts to trigger the changing of opening and closing you have to look at the eye on the left of the first door. if you leave the first door fully open then look at the eye to make it start to close, quickly walk through the first which result in you being in the corridor while the second door opens to let you through.
The second puzzle will be in a big room with two gates if you look at the eye on the right it will open the first gate but shut the second gate. What you have to do is look at the eye to open the first gate, go into the second area and go up the stairs, now from the top of the stairs look at the eye again to close the first gate, this will now make a little bridge from the wall and gate you can cross, if you cross that bridge then go to the right and look at the eye a 3rd time to open the gate again, lastly you want to walk all the way to the end of the wall where there is a little gap, look down the gap but do not jump down, this will open the second gate letting a light beam go right across the room and onto the light activated switch which will allow you into the next room.
In the last room you will come across a tower full of eyes, if you spin all the eyes twice starting from the bottom working to the top, then spin the second bottom eye twice again then the bottom one once more they will all be facing the door, if you stand at the door and look at all of the eyes at the same time the door behind you will open just walk backwards and you will have finished the level.
If you get stuck on anything I have included a guide below.