Iceblink is a phenomenon that occurs when sunlight reflects off ice or snow, creating a bright, shimmering effect in the sky. This optical illusion is often seen in polar regions or near glaciers, where the sunlight interacts with the ice crystals. It can appear as a bright white or bluish glow, making the landscape look ethereal. The term "iceblink" is commonly used in navigation and exploration contexts, as it helps sailors and explorers identify the presence of ice even when it is not directly visible. This can be crucial for safety, as it warns of potential hazards in icy waters.