Multiple choice Which of the following factors is responsible for the transparency of the cornea? Absence of nerve fibers Presence of nerve fibers Presence of heat and touch receptors Presence of blood vessels Absence of blood vessels Reveal answer Fill a bubble to check yourself E Correct answer Explanation The transparency of the cornea is due to the fact that it contains hardly any cells and no blood vessels. However, blood vessels can creep in from around it if it is constantly irritated or infected which can interfere with vision.