Perfect vision is a term used to describe a state of clarity in one's eyesight. However, there are several other synonyms that can be used to describe such an impeccable state of vision. These include terms such as sharp vision, crystal-clear vision, excellent eyesight, flawless eyesight, impeccable vision, and clear sight. These terms are often used to describe an individual's visual acuity, with sharp vision being a common term used in optometry. People with perfect vision or sharp visual acuity are often said to have 20/20 vision, which signifies their ability to see clearly at 20 feet away. Regardless of the terminology used, having excellent vision is a sign of good eye health and a proper functioning visual system.