Pauli Matrix's eigenvector formalism

In the Wikipedia page for the Pauli matrices, there is a list of the eigenvectors of the Pauli matrices.

Notice at $\sigma_y$, it's eigenvectors are $\begin{pmatrix} 1 \\ \pm i \end{pmatrix}$ but not $\begin{pmatrix} \pm i\\ 1 \end{pmatrix}$, same for $\sigma_x$ and $\sigma_y$.

By which formalism or customs stated that Pauli matrices' eigenvectors are $\begin{pmatrix} 1 \\ \pm i \end{pmatrix}$ but not $\begin{pmatrix} \pm i\\ 1 \end{pmatrix}$?

• They are equal, modulo an $i$ or two. People liked the 1 up top... – Jon Custer Sep 3 '18 at 13:58