This visualization displays annual sales figures for the top ten spectacle brands, using a bar chart where each bar's height represents millions of units sold. The chart loads CSV data from a GitHub Gist via `d3.csv` with `d3.autoType` for automatic data type inference. Bars are rendered as SVG rectangles using the `d3.scaleBand` and `d3.scaleLinear` scales, with axis labels created through `d3.axisBottom` and `d3.axisLeft`. Hovering over a bar changes its color from blue to orange.