Q2- Why it is not possible to keep your eyes open when you sneeze?

It is not possible to keep your eyes open when you sneeze because of a reflex called the pharyngeal reflex, which is a protective reflex of the body. When you sneeze, your body is expelling air and other particles at a high velocity through your nose and mouth. This sudden forceful expulsion of air can also cause the muscles in your face and around your eyes to contract involuntarily.

When this happens, the muscles that control your eyelids will also involuntarily close, resulting in your eyes shutting when you sneeze. This reflex is thought to be a protective mechanism to prevent any particles or bacteria from entering the eyes during a sneeze.

While it is possible to try to keep your eyes open during a sneeze, it can be challenging to overcome this reflexive response, and attempting to keep your eyes open may cause discomfort or strain in your eye muscles.

Five important points that explain why it is not possible to keep your eyes open when you sneeze:

1. Reflex action: Sneezing is a reflex action, which means that it is an automatic response by the body to a stimulus. When we sneeze, the muscles in our face and eyes involuntarily contract, including the muscles that control the eyelids.

2. Pressure buildup: When we sneeze, air is forced out of our nose and mouth at a high velocity. This can create a sudden increase in pressure in the nasal cavity and the chest. The pressure can also affect the eyes, causing them to involuntarily close as a protective reflex.

3. Tear ducts: The muscles that control the eyelids are connected to the tear ducts in our eyes. When the muscles contract during a sneeze, it can also cause the tear ducts to activate, leading to tears and further contributing to the reflexive closure of the eyelids.

4. Protection: Closing our eyes during a sneeze is a protective reflex that helps to prevent foreign particles or bacteria from entering the eyes. It also helps to protect the delicate tissues and membranes in the eyes from the force of the sneeze.

5. Habit: For some people, closing their eyes during a sneeze may be a learned habit. This is because the sudden contraction of the facial muscles during a sneeze can be uncomfortable or startling, leading to a reflexive closing of the eyes as a form of protection.