The cornea is one of only two parts of the human body without blood vessels
The cornea is one of only two organs in the human body that lacks blood vessels. The cornea is the transparent portion of the eye that protects the pupil and other parts of the eye. According to scientists at the Harvard Department of Ophthalmology's Schepens Eye Research Institute, cartilage and the cornea are the only types of tissue in the human body that lack blood vessels. Your eye also has some unusual characteristics that you probably aren't aware of.