While afterimages are usually normal physiological occurrences, abnormally long-lasting or intense afterimages are known as . According to the Cleveland Clinic , persistent afterimages can sometimes be associated with medical conditions such as:
: Research from ScienceDirect indicates that while much of the process starts in the retina, the brain also plays a role in interpreting these lingering signals. Clinical Significance After image
: The primary cause is the depletion of photopigments in the retina's cone cells during prolonged exposure to a specific color. After image