What is one key symptom of cataracts?

Blurred vision is a key symptom of cataracts because the condition leads to the clouding of the eye's lens, which interferes with the passage of light. As cataracts develop, they scatter light rather than focusing it clearly on the retina, creating a blurred or hazy vision effect. Individuals with cataracts may find that they have difficulty reading, seeing faces, or performing tasks that require sharp vision.

As for the other options, increased peripheral vision is not typically associated with cataracts, as the primary issue lies in central vision clarity rather than peripheral expansion. Enhanced color perception would not occur with cataracts; in fact, many individuals might experience a fading of color vibrancy due to the lens's cloudiness. Sensitivity to bright lights can occur with cataracts as well, especially at night, but it is not as definitive a symptom as blurred vision, which tends to be more universally reported among individuals with this condition.