I have an eye on you! Something is interesting to watch or is being observed. In ancient cultures often a religious sign, such as the eye of Horus or the evil eye in the Orient.
The eye emoji was introduced in 2014 and released as part of the Unicode 11.0 standard. This emoji can be found under the people and body
category. Because the eye emoji has been around for quite some time, it should display correctly in the majority of operating systems.