\begin{tikzpicture}
            \clip (0,0) circle (2.3cm);
            \tkzDefPoint(0,0){O}
            \tkzDefPoint(2,0){A}
            \tkzDefPoint(.5,-.3){p}
            \tkzDefPoint(.7,.3){q}
            \tkzDrawCircle[dashed,color=blue](O,A)
            \tkzDefPoint(-.3,-0.25){z}
            \tkzDefPoint(-.8,-0.1){w}
            \tkzClipCircle(O,A)
            \tkzDrawCircle[orthogonal through=z and w](O,A)
            \tkzDrawCircle[orthogonal through=p and q](O,A)
            \draw (0,-2)--(0,2);
            \tkzDrawPoints[size=8,fill=red](O)
\end{tikzpicture}