Many people experience significant difficulty using a standard computer mouse. Traditional mouse interfaces require small, precise finger movements to control both cursor movement and clicking. For individuals with motor impairments, reduced coordination, limited hand control, or certain cognitive conditions, this combination of tasks can make basic computer interaction frustrating or inaccessible. These challenges are also common among older adults and individuals who benefit from simplified and more predictable interaction methods.

This is designed as an accessible alternative to conventional mouse devices. Instead of using small mechanical buttons, the device incorporates large pressure-sensitive click surfaces integrated into the upper panel of the interface. These wide surfaces allow users to activate left or right clicks simply by pressing anywhere on the designated areas, reducing the need for precise finger placement and fine motor control.

Cursor movement is controlled through a centrally positioned trackball that remains stationary while the user rotates the exposed ball to move the pointer on screen. Because the device itself does not need to be moved across a desk surface, users only need to control the motion of the ball. This separation between cursor movement and device displacement significantly simplifies the interaction process. It allows users to operate the computer using broader and more natural movements with the hand, forearm, or even the foot.

The design also supports the connection of external assistive switches. This feature allows users to distribute control actions across different body movements depending on their abilities. For example, a user may move the trackball using their foot while activating clicks with an external switch positioned near the knee, hand, or head. This flexibility enables the interface to adapt to a wide range of motor capabilities and personalized interaction strategies.

The concept was developed through direct experimentation while working with a user who could only control movement with their foot. Early prototypes involved fixing a conventional mouse in place and adding external switches to trigger clicks. However, pressing the buttons often caused unintended cursor movement. Several alternative configurations were tested, including different types of mice and mounting structures, until a trackball configuration proved to be the most stable and controllable solution. The current prototype integrates this trackball approach with large click surfaces that simplify the clicking action.

From a manufacturing perspective, the device can be produced using widely available components such as standard trackball modules, microcontrollers, and simple pressure or membrane switches integrated into an injection-molded or 3D-printed enclosure. This approach allows the design to remain relatively simple and cost-efficient to manufacture, making it feasible for small-scale production or distributed fabrication.

WideClick Trackball is compatible with the accessibility features already built into operating systems such as Windows and macOS, including click-lock, single-click activation, and pointer control adjustments. These software tools further enhance the adaptability of the device for different users.

By simplifying the relationship between cursor movement and clicking, the design provides a more accessible and intuitive way for people with diverse motor abilities to interact with computers in homes, schools, rehabilitation centers, and assistive technology environments.