What is the range of clear vision in a person?

Visual perception:

1. Visual perception, or sight, is the ability to use light in the visible spectrum reflected by stimuli in the environment to perceive the surroundings through photopic vision, color vision, scotopic vision, and mesopic vision.
2. A normal human eye's range of vision is the distance at which the eye can clearly see an item.
3. It spans the distance between far and near points, from infinity to 25 cm.