US Patent 10161719 Viewfinder for bow strings

Viewfinder for bow strings, aimed to be connected to a bow string such that a user may look through it and obtain a precise shot, which comprises an elongated body with a through-hole defined between a front side and a rear side, wherein the hole further comprises a first sector, a second sector and a third sector, designed to prevent the reflections produced inside the hole by the light beams hitting it from the exterior from propagating to the user.