This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
ScintillatingScotoma. author Greensburger en Roberta CommonsHelper Greensburger en Greensburger original upload log page en ScintillatingScotoma Greensburger bytes no Greensburger Scintillating scotoma
Page 2023 Free-images.com. All images are Public Domain