Light receptors in the eye

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  • Light receptors in the eye
    • Rod cells
      • More than cone cells
      • More in the periphery of the retina and none at the fovea
      • Poor visual acuity
      • Sensitive to low intensity light
        • Rhodopsin sufficiently broken down by low-intensity light.
      • Rhodopsin sufficiently broken down by low-intensity light.
      • Three cells linked to one neurone
        • Poor visual acuity
    • Cone cells
      • Less than rod cells
      • Concentrated at the fovea and fewer at the periphery of the retina
      • One neurone linked to one cell
      • High visual acuity
        • One neurone linked to one cell
      • Not sensitive to low-intensity light
      • A higher light intensity is required to breakdown iodopsin.
        • Not sensitive to low-intensity light

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