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.
2. An interesting question, but an example of the thing that cannot be seen would help a lot. 'With the naked eye' implies that it can be seen when using an (optical) instrument-e.g. Jupiter's satellites can't be seen with the naked eye, but can be seen through a telescope.