How many ducts open into the superior fornix?

How many ducts open into the superior fornix?

• A. 3-9 excretory ducts
• B. 1 duct
• C. 10-20 excretory ducts
• D. 2-5 excretory ducts

Answer: (A)

Tears reach the ocular surface through multiple excretory ducts that open into the upper conjunctival fornix. The lacrimal gland has several ducts—roughly a dozen to two dozen openings—that secrete tears onto the surface of the eye. This numerous opening pattern in the superior fornix allows tears to spread evenly across the cornea and conjunctiva. Because of this typical distribution, the most accurate range to describe how many ducts open into the superior fornix is about 10 to 20 excretory ducts. The exact number can vary among individuals, but this range best reflects standard anatomy.

Tears reach the ocular surface through multiple excretory ducts that open into the upper conjunctival fornix. The lacrimal gland has several ducts—roughly a dozen to two dozen openings—that secrete tears onto the surface of the eye. This numerous opening pattern in the superior fornix allows tears to spread evenly across the cornea and conjunctiva. Because of this typical distribution, the most accurate range to describe how many ducts open into the superior fornix is about 10 to 20 excretory ducts. The exact number can vary among individuals, but this range best reflects standard anatomy.