How can I make a convex lens with TikZ
?
I tried using arcs but this doesn't look right.
\documentclass[tikz]{standalone}
\begin{document}
\begin{tikzpicture}
\pgfmathsetmacro{\xr}{0.35}
\pgfmathsetmacro{\yr}{2}
\draw (0, 0) coordinate (O) arc[x radius = \xr cm, y radius = \yr cm,
start angle = 90, end angle = 270];
\draw (O) arc[x radius = \xr cm, y radius = \yr cm,
start angle = 90, end angle = -90];
\end{tikzpicture}
\end{document}
I would like the arcs to meet at a sharp corner not rounded.