Which symptom is NOT typically associated with chemotherapy?

Improved vision is not typically associated with chemotherapy. Chemotherapy is a treatment that targets rapidly dividing cells, which includes not just cancer cells but also other rapidly growing normal cells in the body. Common side effects of chemotherapy often include fatigue, rash, and nausea. These symptoms arise because chemotherapy can impact various body systems, leading to conditions such as low blood cell counts, skin reactions, and gastrointestinal distress.

Fatigue occurs as a result of both the direct effects of chemotherapy on the body's systems and the body's response to cancer. Rash can appear due to the specific chemotherapeutic agents that may cause skin reactions or even as a hypersensitivity response. Nausea is a well-known side effect of many chemotherapy regimens, often related to the effects on the gastrointestinal tract and the central nervous system.

In contrast, improvements in vision would not be a side effect of chemotherapy. While some patients may report temporary changes in vision due to stress or other unrelated factors, chemotherapy itself does not improve visual acuity or address vision problems. This distinction makes improved vision the correct answer to the question regarding which symptom is not typically associated with chemotherapy.