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Related Experiment Videos

Eye light flashes on the Mir space station.

S Avdeev1, V Bidoli, M Casolino

  • 1Russian Space Corporation "Energia" Korolev, Korolev, Moscow, Russia.

Acta Astronautica
|April 19, 2002
PubMed
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Astronauts in space experience light flashes (LF) due to radiation. Heavy atomic nuclei are about 100 times more likely than protons to cause these visual phenomena.

Area of Science:

  • Space science
  • Radiation biology
  • Ophthalmology

Background:

  • Astronauts in space report experiencing light flashes (LF).
  • The cause of these visual phenomena is linked to space radiation exposure.
  • Understanding LF is crucial for astronaut health and safety during long-duration space missions.

Purpose of the Study:

  • To investigate the causes of light flashes (LF) in astronauts' eyes.
  • To correlate particle detection data with human observations of LF.
  • To determine the probability of different types of space radiation particles causing LF.

Main Methods:

  • Utilized SilEye detectors onboard the Mir space station to record particle impacts on the eye.
  • Collected and analyzed data on particle types, energy, and linear energy transfer (LET).

Related Experiment Videos

  • Correlated instrumental data with subjective human observations of light flashes.

    • Main Results:

    • Heavy atomic nuclei have a ~1% probability of causing LF, while protons have a much lower probability.
    • The probability of LF increases with the linear energy transfer (LET) of particles.
    • LF probability reaches approximately 5% at LET values around 50 keV/micrometer.

    Conclusions:

    • Heavy ions, not protons, are the primary cause of light flashes in space.
    • The LET of a particle is a key factor determining its potential to induce LF.
    • These findings contribute to understanding the biological effects of space radiation on the human visual system.