Illusions: Illusions are false or misleading perceptions of reality that can occur in various sensory modalities, including vision. For example, an optical illusion might make two lines appear different lengths when they're actually the same.
Hallucinations: Hallucinations are sensory experiences that occur without any external stimulus. In the context of visual perception alterations, this refers to seeing things that aren't actually there, such as imaginary objects or people.
Depth Perception: Depth perception is our ability to perceive objects in three dimensions and judge their distance from us accurately. It allows us to understand how far away something is and helps with tasks like catching a ball or navigating through space.