It is said to be inverted
If it's both upside down and reversed from left to right, it would be equivalent to the image rotated 180 degrees.
it is convex
An image that is upside down as compared to the object are known as inverted images. Example, the first thing you will notice is that the concave side of the spoon makes your image come upside down. Such an image is called an inverted image.
concave
If you mean during printing and are referring to the projected image, it is upside down if you put the negative in the carrier the wrong way. The image should go upside down in the carrier so that it is projected right side up.
The word "NOON" is an example of an image that reads the same right side up and upside down.
convex lens
an enlarged, upside-down virual image.
it is upside down in the back of the eye and the brain corrects that.
If the angles of the mirrors that you used on periscope are not parallel to each other you would see the image upside down.
The inverted or upside-down image is formed on the retina.
This could be called optical illusions.