Entoptic phenomenon: A Look Within Your Eyes

  • Have you observed bright colored lights when rubbing your eyes? Have you seen transparent stringy particles floating midair when looking at the sky? Have you wondered if they are actually there? Or, are your eyes are fooling you? The answer is no; they aren’t there, but — your eyes aren’t fooling you either. These visual effects are called entoptic phenomena, derived from Greek, ento (within), and optic (eye). Therefore, entoptic means occurring within or inside one’s eye. 

    The renowned German scientist Hermann von Helmholtz once said, “under suitable light conditions light falling on the eye may render visible certain objects within the eye itself. These perceptions are called entoptical.” Interestingly, this phenomenon is purely subjective. They cannot be observed by an eye doctor using an instrument and cannot be photographed. Sometimes the phenomenon can be used to monitor eye diseases, but most occurrences are unconcerning. In this post, we discuss three commonly observed phenomena and how to differentiate these occurrences from the abnormal ones. 


    Continue reading: https://www.boldedscience.com/blog/entoptic-phenomenon-a-look-within-your-eyes


    Author: Sandhya Uma Shekar