Niphablepsia is a rare medical condition that affects individuals who have a profound sensitivity to light. The word is spelled with silent letters, which can cause confusion when trying to pronounce it. The correct pronunciation is [nɪ.fə.ˈblɛp.si.ə]. The "ph" in the middle of the word is silent, and the "e" at the end is not pronounced. The spelling of this word can be confusing, but once the correct pronunciation is known, it becomes easier to understand the condition and how it affects those who experience it.
Snow-blindness, amblyopia caused by the glare of sunlight on the snow.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.