The first time you go to Solusek's Eye can be a frustrating experience. Head off up the right hand side of the map, navigate your way through the temple until you find the secret door and exit the temple.
Now make your way down the left hand side of the map circling back to the middle and you will find the tunnel leading to the entrance.
Follow the tunnel and the ledge on the other side to the entrance, remembering to walk over the cog on the left hand side. This then allows you to use the cog on the docks to teleport straight to the entrance from then on.
Avoid dieing from the mobs and falling in the lava and you are there.
Seriously, using the map and the guide here, set waypoints at short intervals and go from one to the other. You can probably invis or stealth past some of the mobs and being careful get past more. If the ones on the path outside the entrance are too much, amour buff and speed buff your way to the door and zone in.
You will have to come back here for other quests so make sure you run other the teleporter.