Wow $160 for luminous contacts in 1961 ... bet the price went up in 45 years :) But, the technology has also improved in 45 years...better solutions, etc.
Today, contact lenses may used to read either Luminous or Ultra-Luminous (aka. Black Panther) marked cards. Both are similar technologies but each works using sleightly different frequencies. I personally prefer filtered sunglasses....in addition, the old style contact lenses and old style sunglasses were so dark that you would walk into walls :) ... in addition, they would give you a headache if you wore then for a while due to the odd color.
I don't want to post information on contact lenses because contact lenses are considered medical devices and you need a perscription to legally get them in the USA. Yes, I know you can buy contacts over the net....But, to avoid eye damage the contact lenses need to be fitted to your eyes...only then can they be made into a filter to read luminous or Ultra-Luminous markings.
I agree that Juice is a less expensive way to go even though you will have to practice a bit to read Juice.....and Juice can be just as deceptive as Luminous technology without the need for sunglasses or contact lenses.
PM me for more info which I am not willing to discuss publically.
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