What can result from low levels of vitamin A?

Low levels of vitamin A can lead to poor night vision, which is also often referred to as night blindness. Vitamin A is essential for the production of rhodopsin, a pigment found in the retina that enables the eyes to adjust to low-light conditions. When vitamin A levels are inadequate, the ability to see in dim light diminishes, resulting in difficulties or impairment in vision during the night or in other low-light situations.

While night blindness is specifically a symptom of poor vision at night, it is often categorized under the broader issue of poor night vision. This highlights the importance of vitamin A in maintaining overall visual function, particularly in low-light environments.

In this case, while fatigue and bone weakness can stem from deficiencies of other nutrients or health issues, they are not directly linked to vitamin A deficiency as night blindness is.