Suppliers & Resources
Contact Lenses Online sells "Special Effects" contacts, such as the white lenses shown below. These will let light in, but will block out almost all the useful information that you would otherwise get. They're a bit pricy, and you do need to have a prescription (but your regular contact prescription will do, if you already wear contacts) but for simulating blindness, you'd be hard pressed to come up with a better solution.
[Note about contact lenses: Many companies make what are called "Opaque" contacts. These are not for blocking vision, they are for changing the color of your eyes. People who have darker eyes and wish to go to a light color wear opaque contacts, which block part of the iris, allowing the lighter color of the lens to be seen.]
National Federation for the Blind is a national organization for blind and visually impaired persons.
Autofold Makes canes and mobility accessories for visually impaired, including the classic "white cane"