Don't things only rich people will buy it e.g. I think it can be very useful for blind people especially those who recently got blind and haven't adapted yet.

Don't things only rich people will buy it e.g. I think it can be very useful for blind people especially those who recently got blind and haven't adapted yet. I would be happy to hear opinion of any developer here on HN that is blind if they might find this tech appealing and useful.