Rime to the eye or frost on the eye refers to a thin layer of ice crystals that forms on surfaces during cold temperatures. There are various synonyms for rime to the eye, such as hoarfrost, white frost, and silver frost. Hoarfrost specifically describes a type of frost that forms on objects that are exposed to the air, while white frost refers to a thin layer of ice that covers surfaces such as windows. Silver frost is similar to hoarfrost, but its crystals are dense and form intricate patterns. Other synonyms for rime to the eye include fern frost, needle frost, and window frost, which all describe frost that forms in different ways and on different surfaces.