The question entered the crosshairs of some gun control advocates over the weekend, after a report about Iowa issuing permits to buy and carry firearms to people who are legally blind.
That's legal under the federal Gun Control Act of 1968, which limits who can get guns nationwide. People who were convicted of crimes and served time for more than a year, people addicted to controlled substances and anyone who has been committed to a mental institution are among those who aren't allowed to possess firearms.
Each state has different rules governing gun permits.
In Iowa, at least, the visually impaired can get permits to carry firearms in public, The Des Moines Register reported on Sunday.
http://www.cnn.com/2013/09/08/us/gun-permits-blind/