JOHN THYS / REPORTERS / SCIENCE PHOTO LIBRARY JOHN THYS / REPORTERS / SCIENCE PHOTO LIBRARY
Premature baby. Nurse placing LED goggles over a premature baby's eyes prior to a visual evoked potential (VEP) test. This test measures the brain's response to light. The length of time the brain takes to respond to the light is measured and compared against the response times for healthy brains.
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