Final answer:
The true statement about the cornea is that it lacks blood vessels, ensuring its transparency for optimal vision. The cornea is sensitive due to many nerve endings and can heal from minor injuries, it is not connected to the brain's dura mater but rather works with the lens to focus light on the retina.
Step-by-step explanation:
The true statement about the cornea is that it lacks blood vessels. The cornea is the clear, transparent front covering which admits light and begins the process of optical refraction. It is part of the eye's fibrous tunic, which also includes the white sclera. Unlike the sclera, the cornea is composed of connective tissue with epithelia, and it seamlessly transitions to the sclera at the corneal limbus These characteristics of the cornea contribute to its transparency and its ability to refract light to help focus it onto the retina at the back of the eye.
The cornea is highly innervated with sensory nerve endings, which makes it very sensitive to pain. Contrary to being unable to regenerate, the cornea has a remarkable ability to heal minor scratches and abrasions. It does not continue with the dura mater of the brain; rather, it is an integral part of the eye that works in unison with the lens to focus light onto the retina. The absence of vascular tissue in the cornea is essential for maintaining its transparency and optimizing vision.