EYS

EYS is the symbol for the human gene eyes shut homolog. The gene encodes a large extracellular matrix protein expressed predominantly in the retina and is important for the maintenance of photoreceptor cells, particularly in the outer segments and connecting cilium. The protein is involved in the structural integrity of photoreceptor outer segments and in ciliary functions essential for photoreceptor survival.

Mutations in EYS are among the most common causes of autosomal recessive retinitis pigmentosa in many populations and have also been linked to cone-rod dystrophy. Individuals with EYS-related retinal disease typically experience progressive vision loss beginning in childhood or adolescence, with degeneration of the retina over time.

In evolutionary terms, EYS has homologs in multiple vertebrate and invertebrate species. The human EYS gene is named as a homolog of the Drosophila gene eyes shut, reflecting conserved aspects of photoreceptor biology across species.

Outside of genetics, EYS can function as an acronym in various contexts, referring to organizations, programs, or projects depending on the context. There is no single dominant non-genetic meaning for the acronym in common use, so the interpretation of EYS is typically determined by surrounding information.