I don't think you can 'nuke' yourself. It isn't that kind of radiation (it isn't ionizing radiation) and can't cause damage to your molecules. I would not put my eye there - the door sometimes is see through but it has metal grate in in. The microwave cooks via heating the moisture in the food, and so I wouldn't put a body part near an opening in the microwave.
Are you sure that you are seeing the light that illuminates the food and not a pilot light that illuminates the buttons. The pilot light doesn't matter. I wouldn't think that an opening into the microwave chamber would be good.