I find that visual problems in LDs don't have anything to do with my eyes, physical or otherwise. The problem seems to always stem from consciousness. Consciousness is retracting from the dreamscape and needs to go back out. Get interested in the dream. Pick up an object, inspect it. Become curious. As soon as you put attention on your self, you start leaving the dream. You're becoming separate. In a high level lucid dream, your attention is out in the world.