How does light emanating from one point propagate after passing through a diffusing lens?

If the point emitting light is from the collecting lens at a distance less than the focal length, then the light from this point, incident on the lens in any direction, is not collected by the lens at one point, but diverges so that it is perceived by the eye emanating from one point behind the lens.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.