Fear from dark is the one of the most common fears among children.
As said by Thomas Ollendick, professor of psychology and director of the Child Study Center at Virginia Tech "What always amazes us are the thoughts or beliefs that kids have,” she adds “Kids believe everything imaginable, that in the dark robbers might come or they could get kidnapped, or someone might come and take their toys away."
If this anxiety reaches extreme level in a grown child it leads to phobia called nyctophobia.