How do the following processes occur? (AS 1)

When we see an object, a real inverted image is formed on the retina.

When we see an object, the light enters through the cornea and is passed through the pupil. Iris determines the amount of light that passes through the pupil by adjusting the size of pupil. The converging lens of the eye then collects the light and refracts it to a focal point. The image is formed on the retina and is a real inverted image. The photoreceptors are then stimulated by this image to produce messages which are sent to the brain via the optic nerve. The brain interprets the image as an upright object.