My twelve year old has recently shown interest in bow hunting. He has been shooting for a year now and still can’t close his recessive eye. He uses an old pair of sun glasses. We covered the lens with electrical tape on the recessive eye, and removed the lens for his shooting eye. This works for target shooting, but not very well for hunting. It would be nice if we could find a patch that flips down. This way he could scan the woods with both eyes, then flip down the patch to shoot. Any ideas?