Some of these differences are as follows.
Perception is necessarily tied to sensory stimulation whereas conception is not.
That is, one perceives objects only in their presence, and not in their absence.
Perception is reproduc- tive in this sense, whereas conception can be anticipatory or evocative.
Perception refers to the way sensory information is organized, interpreted, and consciously experienced.
Perception involves both bottom-up and top-down processing.
Bottom-up processing refers to the fact that perceptions are built from sensory input.
Perception is the ability to see, hear, or become aware of something through the senses and conception is the ability to form something in the mind and to develop an understanding.
This is the key difference between conception and perception.