Porthole

<svg
    xmlns="http://www.w3.org/2000/svg"
    width="512"
    height="512"
    viewBox="0 0 100 100"
>
    <path
        d="M50 10c-22.056 0-40 17.955-40 40.025S27.944 90.05 50 90.05s40-17.955 40-40.025S72.056 10 50 10zm0 78.05c-20.953 0-38-17.058-38-38.025S29.047 12 50 12s38 17.059 38 38.025S70.953 88.05 50 88.05z"
    />
    <path
        d="M50 30.285c-10.553 0-19.138 8.591-19.138 19.15S39.447 68.586 50 68.586s19.138-8.59 19.138-19.15S60.553 30.286 50 30.286zm0 2c9.45 0 17.138 7.694 17.138 17.15 0 .428-.033.847-.064 1.266a6.578 6.578 0 0 1-4.38-2.458c-.38-.476-1.186-.476-1.566 0-1.265 1.594-3.15 2.508-5.172 2.508s-3.907-.914-5.173-2.508c-.38-.476-1.186-.476-1.566 0-1.266 1.594-3.152 2.508-5.173 2.508s-3.907-.914-5.172-2.508c-.38-.476-1.187-.476-1.567 0a6.578 6.578 0 0 1-4.38 2.458c-.03-.42-.063-.838-.063-1.265 0-9.457 7.688-17.15 17.138-17.15zm0 34.3c-8.341 0-15.3-5.995-16.821-13.905a8.536 8.536 0 0 0 4.91-2.33 8.548 8.548 0 0 0 5.955 2.401c2.245 0 4.36-.863 5.956-2.401a8.548 8.548 0 0 0 5.956 2.401c2.245 0 4.36-.863 5.956-2.401a8.536 8.536 0 0 0 4.91 2.33C65.3 60.59 58.34 66.586 50 66.586zM50 27.088c3.258 0 5.91-2.652 5.91-5.912s-2.652-5.912-5.91-5.912-5.91 2.652-5.91 5.912 2.652 5.912 5.91 5.912zm0-9.824c2.156 0 3.91 1.755 3.91 3.912s-1.754 3.912-3.91 3.912-3.91-1.755-3.91-3.912 1.754-3.912 3.91-3.912zM30.019 35.363h.002a5.87 5.87 0 0 0 4.177-1.73 5.919 5.919 0 0 0-.002-8.359 5.871 5.871 0 0 0-4.18-1.732h-.002a5.868 5.868 0 0 0-4.178 1.73 5.869 5.869 0 0 0-1.73 4.18c0 1.578.616 3.063 1.733 4.179a5.871 5.871 0 0 0 4.18 1.732zm-2.769-8.676a3.882 3.882 0 0 1 2.764-1.145h.002c1.044 0 2.026.407 2.766 1.146a3.917 3.917 0 0 1 .002 5.532 3.88 3.88 0 0 1-2.763 1.143h-.002a3.887 3.887 0 0 1-2.766-1.146c-.739-.74-1.146-1.72-1.147-2.766s.406-2.026 1.144-2.764zM27.652 49.436a5.917 5.917 0 0 0-5.912-5.91c-3.26 0-5.912 2.65-5.912 5.91s2.652 5.909 5.912 5.909 5.912-2.65 5.912-5.91zm-5.912 3.909c-2.157 0-3.912-1.754-3.912-3.91s1.755-3.909 3.912-3.909 3.912 1.754 3.912 3.91-1.755 3.909-3.912 3.909zM30.021 63.508h-.002a5.87 5.87 0 0 0-4.18 1.732 5.874 5.874 0 0 0-1.733 4.18c0 1.578.614 3.062 1.73 4.179a5.868 5.868 0 0 0 4.178 1.73h.002a5.871 5.871 0 0 0 4.18-1.732 5.919 5.919 0 0 0 .002-8.36 5.869 5.869 0 0 0-4.177-1.73zm2.76 8.675a3.887 3.887 0 0 1-2.765 1.146h-.002c-1.044 0-2.025-.406-2.764-1.144s-1.144-1.72-1.144-2.765.408-2.026 1.147-2.766a3.887 3.887 0 0 1 2.766-1.146h.002c1.043 0 2.025.406 2.762 1.143a3.916 3.916 0 0 1-.001 5.532zM50 71.783a5.917 5.917 0 0 0-5.91 5.912c0 3.261 2.652 5.913 5.91 5.913s5.91-2.652 5.91-5.913c0-3.26-2.652-5.912-5.91-5.912zm0 9.825c-2.156 0-3.91-1.755-3.91-3.913s1.754-3.912 3.91-3.912 3.91 1.755 3.91 3.912-1.754 3.913-3.91 3.913zM69.981 63.508h-.002a5.87 5.87 0 0 0-4.177 1.73 5.919 5.919 0 0 0 .002 8.359 5.871 5.871 0 0 0 4.18 1.732h.002a5.868 5.868 0 0 0 4.178-1.73 5.869 5.869 0 0 0 1.73-4.18c0-1.578-.616-3.063-1.733-4.179a5.871 5.871 0 0 0-4.18-1.732zm2.769 8.677a3.882 3.882 0 0 1-2.764 1.144h-.002a3.887 3.887 0 0 1-2.766-1.146 3.917 3.917 0 0 1-.002-5.532 3.883 3.883 0 0 1 2.763-1.143h.002c1.044 0 2.027.407 2.766 1.146.739.74 1.146 1.721 1.147 2.766s-.406 2.026-1.144 2.765zM72.348 49.436a5.917 5.917 0 0 0 5.912 5.909c3.26 0 5.912-2.65 5.912-5.91s-2.652-5.909-5.912-5.909a5.917 5.917 0 0 0-5.912 5.91zm5.912-3.91c2.157 0 3.912 1.754 3.912 3.91s-1.755 3.909-3.912 3.909-3.912-1.754-3.912-3.91 1.755-3.909 3.912-3.909zM69.979 35.363h.002a5.87 5.87 0 0 0 4.18-1.732 5.874 5.874 0 0 0 1.733-4.18 5.869 5.869 0 0 0-1.73-4.179 5.868 5.868 0 0 0-4.178-1.73h-.002a5.871 5.871 0 0 0-4.18 1.732 5.919 5.919 0 0 0-.002 8.36 5.865 5.865 0 0 0 4.177 1.73zm-2.76-8.675a3.887 3.887 0 0 1 2.765-1.146h.002c1.044 0 2.025.406 2.764 1.145s1.144 1.72 1.144 2.764-.408 2.027-1.147 2.766a3.887 3.887 0 0 1-2.766 1.146h-.002a3.881 3.881 0 0 1-2.762-1.143 3.916 3.916 0 0 1 .001-5.532z"
    />
</svg>