1. A pathological fear of light being directed upon the eyes: Whenever George had to go to the ophthalmologist for a regular checkup, he had photaugiaphobia because of his hatred of the glaring beam of luminance that was directed into his organs of vision.
2. An intolerance of light glare: Some plants, having photaugiaphobia, only grow in shady areas and avoid the sun, as with some forms of the fern, otherwise they would die.

Susan, affected by photaugiophobia, had to be very careful of the blazing sun in the desert which could cause photalgia, a pain caused by such dazzling rays of sunshine, so she always wore sunglasses as much as possible.