Hello... I need some help... Can I use concave mirrors to reflect sunlight? If I look very close at a mistletoe, Why can I view the entire room upside down? Is mistletoe a mirror of sort? And, is it true that there is a special eyeglass that is as effective as an ordinary eyeglass in a way that instead of using lenses, the special eyeglass has numerous punholes which allow light to pass so the user can see object clearly?