Pronunciation: [fˈɪʃ ˈa͡ɪn] (IPA) 
The spelling of the word "fish eyen" is an archaic form of the modern word "fish eyes". The pronunciation is /fɪʃ ˈaɪən/ - 'fish' is pronounced with a short 'i' sound followed by 'sh', and 'eyen' is an old way of spelling 'eyes' which is pronounced with a diphthong of 'ai'. This word is no longer commonly used and has been replaced by the modern spelling of "fish eyes".
Fish eye is a term used to describe an optical effect that resembles the bulging, convex shape of a fish's eye. It is typically seen in photographs or videos captured with a wide-angle lens, resulting in a distorted and exaggerated perspective. The phenomenon occurs due to the lens's extremely short focal length, which causes a significant amount of barrel distortion.
When viewing an image or footage with a fish eye effect, objects in the center appear relatively normal, while those around the edges appear stretched and curved. Straight lines become bent, creating a unique visual appearance. This distortion tends to capture a wider field of view than a typical lens, leading to a spherical image that may encompass almost 180 degrees.
Fish eye lenses find applications in various fields, including photography, cinematography, and surveillance systems. They are particularly useful when a broad perspective is required, such as in landscape photography or in tight spaces where it is challenging to capture an entire scene. Additionally, the exaggerated distortion of a fish eye lens can also be used creatively in arts, adding a surreal or exaggerated effect to visual compositions.
Overall, fish eye refers to the optical effect produced by a wide-angle lens, which distorts the perceived perspective and creates a distinctive, curved appearance reminiscent of a fish's eye.
The term "fish eyen" is derived from Middle English. The word "eyen" is the plural form of "eye", while "fish" refers to the aquatic creatures. The combination of these words in Middle English gives us "fish eyen", which means "fish eyes". The term likely arose from the visual similarity between the eyes of certain fish species and the shape or appearance of human eyes.
