Lens

Edit and compile if you like:

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\documentclass[border=2pt]{standalone}
% Drawing
\usepackage{tikz}
\tikzset{>=latex}
\usetikzlibrary{decorations.markings, calc}
% New Command
%% Middle Line Label
\newcommand{\midlabelline}[3]{
   \node (midlabel) at ($ (#1)!.5!(#2) $) {#3};
   \draw[<-] (#1) --  (midlabel);
   \draw[->] (midlabel) -- (#2);
}
%% Point
\newcommand{\point}[3]{
\draw[fill=black] (#1) circle (1pt) node[#3] {#2};
}
% Styles
%% Arrow in the Middle
\tikzset{arrow inside/.style = {postaction=decorate,decoration={markings,mark=at position 0.52 with \arrow{stealth}}}}
% Define Color
\definecolor{glass}{cmyk}{0.2,0,0,0}
\begin{document}
    
    \begin{tikzpicture}[scale=1.5]
        % Grid
%       \draw[help lines] (-3,-3) grid (6,6);
        % Lens      
        \path[fill=glass, draw=black, line width = 0.6] (1,-2) .. controls (0.8,0) .. (1,2) .. controls (1.2,0) .. (1,-2);
        
        % Axis
        \draw[dashed, black!60] (1,-1.9) -- (1,1.9);
        \draw[dashed, black!60] (-2.5,0) -- (3.5,0);
        
        % Ray
 
 
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