What is a common symptom of cataracts?

A common symptom of cataracts is the appearance of halos around lights. Cataracts cause clouding of the eye's natural lens, which leads to distorted or diffused light entering the eye. This distortion can create visual anomalies such as halos, particularly noticeable at night or in low-light conditions. Individuals may also experience blurred vision, difficulty with glare, and changes in color perception as the condition progresses.

The other options represent symptoms associated with different ocular issues. Sudden vision loss may point to a retinal detachment or other urgent conditions. Severe eye pain could indicate conditions such as glaucoma or acute inflammation, and persistent redness in the eye might be a sign of infections or allergies. Understanding these distinctions helps in identifying cataracts specifically as a condition leading to the characteristic visual disturbances like halos around lights.