Shakespeare help??? Sonnet 113?

It seems that it is saying he cannot see the true form of the world since his love left him. Since his love is no longer in his eyes, she is in his mind, and thus his eye is in his mind on his love. Wherever he looks he sees his love. He says 'my most true mind maketh mine eye untrue', which probably means that his love is 'true love', and his mind is not lying to him in that regard - but a true love in the mind is so powerful that it makes his eyes lie to him.