• Question: Is it possible for complete darkness to blind people or weaken their vision?

    Asked by jakeislington to Rob on 14 Jun 2016.
    • Photo: Rob Stanley

      Rob Stanley answered on 14 Jun 2016:

      I think so, at least to weaken your vision. Like lots of things in our body, if we don’t use them they get weaker.

      There are species of animals that once had eyes, but they now live underground in caves, and so don’t need their eyesight anymore so evolution means that they become completely blind.

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