chair_ball.jpg The image displays a specialized ergonomic chair designed for active sitting, set against a plain white background. The central feature of the chair is a large, teal-green exercise ball that functions as the seat. This ball has a smooth surface marked by several horizontal ridges or lines encircling it. The ball is cradled within a brown plastic frame. At the bottom, there is a wide, curved base made of the same brown material. Attached to the front corners of this base are black caster wheels, allowing the chair to roll; two of these wheels are clearly visible in the foreground. Rising from the rear of the base on the left side of the image is a tall, curved backrest. It is also made of brown plastic and curves upward and slightly inward at the top, resembling a stylized spine or a high-back support structure. A thin silver metal wire frame loops underneath the exercise ball, securing it in place between the base and the backrest assembly. There are no people, text, or diagrams visible in the image. This description was generated automatically. Please feel free to ask questions if you have further questions about the nature of the image or its meaning within the presentation.