it be not true that invisible men have to blind . it it true that light pass through the retina of an invisible man and but in most invisible man movie i have see one way of locate an invisible man be use night vision goggles witch show the sub red part of electromagnetic spectrum . this fact suggest that whatever turn him invisible and it render him hollow only to so call visible part of electromagnetic spectrum with wavelenght between 380 and 780 nm . shift the range of wavelenght sight to sub red ( 780nm to 1mm ) during the process of make invisible could produce a proper seeing ( or even good ) invisible man . and last but not least the invisibility in james bond die another day work only from a long distance and uniform background . otherwise change the point of view will uncover hidden object .