👉 In mathematics, a hydroptic is a region in the plane defined by two equations: 1. \(x^2 + y^2 = 4\) 2. \(y = x^2\) The region described by these two equations is called a "hydroptic" because it resembles an upside-down version of a circle. In geometry, a hydroptic can be thought of as the set of all points that are equidistant from the lines \(x=0\) and \(y