What symptom indicates a customer may have consumed too much alcohol?

Blurred vision is a significant symptom that indicates a customer may have consumed too much alcohol. When a person drinks excessively, it affects their visual acuity and their overall sensory perception, leading to difficulties in focusing and visual disturbances. This can impair their ability to see clearly and can also affect their depth perception, both of which can increase the risk of accidents and dangerous situations.

In contrast, increased energy, improved coordination, and clear speech are not typical indicators of overconsumption. These signs may mistakenly be perceived as a person being under control or sober, although they can often occur in people who have consumed moderate amounts of alcohol or are in a state of euphoria initially. However, as intoxication progresses, symptoms like blurred vision become more prominent and critical to recognize for safety reasons.