• Question: How many megapixels does a human eye have?

    Asked by Dolly da Gucci to Ivy, George, Daniel, Christina, Cheryl on 23 Jan 2017.
    • Photo: Christina Obiero

      Christina Obiero answered on 23 Jan 2017:

      Hi Dolly da Gucci, this is a tough question. I guess you are thinking about comparing the visual capacity of the human eye in terms of resolution (how clear do images appear when we actually see them with our naked eyes) compared to digital cameras. It is difficult to compare these as digital cameras are manufactured to certain specifications to capture images at different resolutions. The higher the megapixels a camera has the better the resolution of the image.
      The human eye sees due to light transmission through the structures in the eye (cornea, lens) to the retina then the brain via the optic nerve. If the structures involved in seeing images are normal then we see the images as they should appear. If any of the structures have a problem e.g. if the lens is clouded (e.g. in diabetes due to high blood sugar levels), then the lens will not be focus the light well on the retina and the message transmitted to the brain will be distorted, resulting in one seeing a blurred image.