This visualization displays eye-tracking scan paths recorded as fixation points over a stimulus image, with each circle’s radius proportional to fixation duration and sequential positions linked by a blue path. Using D3 v5, the code loads CSV data with `csv()` and maps fixation coordinates through `scaleLinear` scales, rendering circles with SVG. The line connecting fixations is built with a `d3.svg.line` (legacy API), while `d3.axisLeft` and `d3.axisBottom` are imported but not used. Data includes timestamp, fixation index, duration, and mapped X/Y positions for individual users.