Optical illusion and Virtual reality

Optical illusion noun - An optical phenomenon that results in a false or deceptive visual impression.

Virtual reality and optical illusion are semantically related. In some cases you can use "Virtual reality" instead a noun phrase "Optical illusion".

Virtual reality noun - A hypothetical three-dimensional visual world created by a computer; user wears special goggles and fiber optic gloves etc., and can enter and move about in this world and interact with objects as if inside it.

Optical illusion and virtual reality are semantically related. Sometimes you can use "Optical illusion" instead a noun phrase "Virtual reality".