Optophobia is the fear of opening one's eyes or seeing something frightening. Synonyms for this condition include various phobias related to vision or light sensitivity. Some of these other phobias include photophobia, nyctophobia, and scopophobia. Photophobia is a sensitivity to light, while nyctophobia is fear of darkness. Scopophobia is the fear of being stared at or watched, which can also relate to visual perception. Other related phobias involve obsceniphobia (the fear of obscene images), ommetaphobia (fear of eyes), and achluophobia (fear of darkness). By understanding these different phobias, we can better understand the causes and treatments for optophobia and other related vision-related fears.