How many sensory nerves does the cornea have approximately?

The cornea has a high density of sensory nerves, with an estimated range of about 70 to 80 sensory nerve fibers. This extensive network is essential for various functions, including the sensation of pain, touch, and temperature, as well as playing a vital role in the protective reflexes of the eye, such as blinking.

Given the significant amount of sensory innervation, this anatomical feature helps maintain corneal health and clarity by ensuring that any potential injury or irritation can elicit a swift protective response. The high concentration of sensory nerves also explains why corneal injury can be particularly painful and why contact lenses can be uncomfortable for some wearers when they come into contact with these sensitive fibers.

In comparison, the other ranges provided in the options do not accurately reflect the well-documented density of sensory nerves found in the cornea. Thus, the selection of 70 to 80 is the most accurate representation of the sensory nerve density in the cornea.