photosensitivity

/ˌfoʊtoʊˌsɛnsɪˈtɪvɪti/
noun
  1. A condition in which the skin or eyes react strongly to light, especially sunlight.
    • Some medications can cause photosensitivity, making your skin burn easily in the sun.
    • People with photosensitivity often need to wear special sunglasses outdoors.
    • Her photosensitivity means she has to avoid bright lights and wear sunscreen every day.
  2. The quality of a material or device that reacts to light, such as photographic film or a sensor.
    • The photosensitivity of the camera sensor allows it to take clear pictures in dim light.
    • Old photographic film had a lower photosensitivity than modern digital sensors.
    • Scientists measure the photosensitivity of solar panels to improve their efficiency.
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