What symptom may indicate a problem with cataracts, particularly at night?

Cataracts can significantly affect a person's vision, particularly in low-light conditions such as nighttime. One of the hallmark symptoms of cataracts, especially when driving at night, is experiencing glare from oncoming headlights. This occurs because the clouding of the lens scatters light as it enters the eye, making bright lights appear to have a halo or causing discomfort due to excessive brightness. This glare can particularly impair night vision and create challenges for activities like driving after sunset.

In contrast, while blurred vision is also associated with cataracts, it doesn't pinpoint the specific issue that arises in low-light situations. Headaches may occur from various eye strain or vision problems but are not specific indicators of cataracts. Double vision can arise from other eye conditions, but it is not a classic symptom associated with cataracts; rather, blurred vision is more common. Thus, glare from oncoming headlights is a distinct symptom that highlights the impact of cataracts in nighttime conditions.