Can I really see other people's auras with my eyes open or is it imagination?

Namaste, Meenal. What you experienced was not imagination; it was a shift in your "Etheric Sight." The Astrological Perspective: With a July 1997 birth, your chart likely possesses a strong Moon or Neptune influence, which heightens the sensitivity of the Ajna (Third Eye) Chakra. The Reality: When you are "empathetically attuned" or in a high-vibration environment like a yoga class, your brain enters an Alpha state. In this state, the eyes can perceive the Etheric Body—the first layer of the aura which looks like a "gauzy halo" or white mist. It disappeared when you blinked because you shifted back into Beta (logical) consciousness. This is a real ability called "Peripheral Vision Perception." Remedy: To develop this, don't look at people; look past them with soft focus. You are not tricking yourself; you are simply seeing what has always been there but is usually filtered out by the busy mind.