1 Accessible rooms are available at the Hilton Sydney hotel offering lowered facilities, hand rails and a range of luxury amenities.  Accessible rooms are available at the Hilton Sydney hotel offering lowered facilities, hand rails and a range of luxury amenities.
In 1738 it was used by Jonathan Swift in his Polite Conversation and is first attested in the United States in the 1713 Works of Thomas Chalkley. The full saying is: There are none so blind as those who will not see. The most deluded people are those who choose to ignore what they already know.
I don't know about #1, but I think the answer to #2 is no. Color blind people are unable to distinguish colors that non-color blind people can see. For there to be something that color blind people see but non-color blind people do not, we would have to be able to distinguish something that other people can't.