One of the scariest things about visiting a doctor while you're sick is that you never know when you’ll be given an injection. Sometimes even the smallest of illnesses are met with a hypodermic needle—unfortunately when you least expect it. Luckily for all of us needle-fearing folk out there, MIT researchers have taken the time to engineer the needleless needle.
The most amazing aspect is that they can now inject a drug directly through the eye into the retina! That's scary cool.