Glassy-eyed is a term used to describe a person whose eyes appear shiny, dull and lack emotion. Antonyms for glassy-eyed include bright-eyed, alert, lively, sparkling and enthusiastic. When eyes are said to be bright, they are full of light, energy and are focused. When a person is alert, they are quick to take notice of their surroundings with active senses. A lively person is exuberant, vibrant and full of vitality. Sparkling refers to the twinkle in a person's eyes which denotes awareness, energy and charm. Enthusiastic describes a person who is eager, passionate and animated. These antonyms represent a person who is alive, active and engaged, as opposed to the disengaged and dull nature of glassy-eyed.