Religion is a powerful delusional effect that plays tricks with the mind.But this is THE science......Image shall form only if there is any deviation from the natural path of light and the natural path is defined by Fermat's Principle......In curved spacetime, the curved path is the natural path, so it cannot be treated as deviation and no image shall form. But image is forming, that means it is not the curved spacetime but deflection of light due to Gravity in flat space background..So simple.

There is no problem...at least half a dozen explanations have been given that does explain it simply.

In essence, there is no problem..

In curved spacetime, Euclidean straightline is meaningless, because nothing can traverse that, not even light. [except possibly the radial lines.]. Resorting to flat Newtonian Space (or Minkowski Spacetime) to provide linear extrapolation is bad. This is not even approximation.

**The path of the light from the emitter to the observer, is dictated by curved spacetime or geodesics.**

The eye interprets that curved geodesic path as a straight line and gives an apparent position different from the true position.

The problem you envisage is non existent.

The eye interprets that curved geodesic path as a straight line and gives an apparent position different from the true position.

The problem you envisage is non existent.