Where does this come from, and can I check it?

Rods enable dark peripheral vision while cones register fine detail and colour. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a human body fact?

Yes. It sits on the Human Body shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

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The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

The human retina contains over one hundred million light receptors

Rods enable dark peripheral vision while cones register fine detail and colour

The retina lining the back of the eye contains roughly 120 million rod cells and 6 million cone cells. Rods operate in low light to detect motion and grey shades, while cones function in bright light to process high-resolution colour details.

Where this comes from

Encyclopaedia Britannica

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Tags: eyes, retina, vision

The human retina contains over one hundred million light receptors: the short answers

Where does this come from, and can I check it?: Rods enable dark peripheral vision while cones register fine detail and colour. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a human body fact?: Yes. It sits on the Human Body shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.