It might be easier to give advice if we saw a lazy-eyed photo.
Try different things. Tilt your head down and look up, or just roll your eyes up a bit. Have the camera shoot from above your eye-level (but if your feet are showing, only do this with the camera 15 feet back or more, or your legs will seem short proportionately). Low camera angles can close your eyes if you look downward. Use your eye muscles to open your lazy eye more. Try raising your eyebrow a bit. If all else fails, try using tape on your forehead, to lift your eye. It can be erased in photoshop.