parallaxfree
Parallaxfree (adj.) describes a property of an optical or display system in which the apparent position of a target or image is independent of the observer's eye position or viewing angle. The term derives from parallax, the apparent shift due to observer movement, and free, meaning free from that effect.
In aiming optics, a parallaxfree reticle means the reticle remains aligned with the target as the shooter's
In imaging and displays, parallaxfree designs aim to reduce or eliminate parallax cues that can arise when
The term is used primarily as marketing or descriptive terminology depending on domain; users should verify