Accommodation Solutions Online

Flicker or Pattern Sensitivity (2A)

Flicker or pattern sensitivity is a student's physiological response to a rapid switching back and forth of visual stimuli from high to low brightness or shifting patterns.
Students with flicker or pattern sensitivity have a physiological reaction to repetitive patterns, flickering video, or stroboscopic lights. Depending on the specific disability, the student's reaction might take the form of a seizure, pain, or visual overload. A flicker rate of 15 - 20 Hz is considered to be the most likely to trigger a physiological response. Flicker at or above 60 Hz are relatively safe as are very low rates, although seizures have been triggered at as few as 3 Hz.

Formal Diagnostics

  • Diagnosis of photosensitive epilepsy
  • Diagnostic information referring to sensitivity to pattern or flicker.

Intake Questions

  • When you see flashing lights or fast moving video do you become queasy or have a seizure?
  • Do complicated patterns such as optical illusions make you feel like you are motion sick?
  • Do quickly moving objects like fans or shadows from trees make you feel disoriented or off-balance?
  • What accommodations or strategies have been effective in the past?

Resources

The Building Accepting Campus Communities (BACC) project was funded by the US Department of Education Office of Secondary Education grant #P333A080070-09. The University of Nebraska does not discriminate based on gender, age, disability, race, color, religion, marital status, veteran's status, national or ethnic origin, or sexual orientation.