Administrators can to some extent. The general public cannot.
What do you mean, with a chip in them or by sight...
sight
because some people have either short sight or long sight only
A lot of people find love at 1st sight. About more than 100,000 people find love at 1st sight around the country in less than a week.
Track!
An Opthalmologist.
By speech
You people are indiots...if your creating a sight that answers questions, you should be the one to answer them, not the viewers of the sight....
So that they can see the track.
Sight? Seriously? Depends on the constitution you're talking about. In the US, about 1 million people sight it each year by visiting the National Archives. Also, lots of people SIGNED the constitution.
It depends on how their sight is damaged. Cornea transplants can restore sight in some (but not all) cases.
Huskies have amazing eye sight that's why people us them to pull sleds