Question

explain how we perceive object as they are.

Answer 1

When image is formed on the retina. The light sensitive cells of retina get activated and they generate electrical signals. These signals are send to brain by the optic nerves for the interpretation. We can sense the objectthrough our eyes, through touch or by the description given to us, through our imagination.
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Answer 2

Answer:

The lens present in our eyes forms a real and inverted image on the retina. The optic nerves carry this image from the retina to the brain. The brain then processes this info to generate clear and virtual images. That's how we perceive objects as they are.