The term "visual impairment" is used to describe a wide range of conditions which affect clarity of vision and visual field. By using a computer with appropriate software and hardware the visually impaired user can be given access to standard resources. 

A Rollerball, also sometimes known as a trackball, provides a mouse alternative that is operated by the user moving a ball to control the pointer movement.  

Finding the right device is only part of the process of helping someone access the computer. Mouse and mouse alternative use involves a considerable degree of motor skills, perceptual skills, the ability to relate the operation of the device to what is happening on the screen and having motivating software.

For users who experience difficulties in operating a mouse or are physically unable to do so, a joystick may prove to be a good alternative solution to control a mouse pointer. 

the complexity of their needs it is often difficult to assess their abilities and to find a way of communication.

Most software is designed to be used by controlling a mouse. For those who do not have the manual dexterity and hand-eye co-ordination to move the pointer or press buttons this is a problem. Access to such software however can be achieved through altering computer settings and by using software programs designed to develop mouse skills. 

A standard mouse is a starting point for controlling a computer. For many, with prolonged use, problems can arise. Simply replacing a mouse with a more suitable alternative can make a massive difference.

When setting up computer access for a learner with physical disabilities it’s important to consider the range of special software and devices that are available and designed to provide such access. This can range from devices and accessibility options inbuilt in the computer operating system that will enable the use of a keyboard and mouse as well as software to assist writing.  

Giving learners with physical disabilities access to the computer can provide motivation and support as well as the intended learning opportunities. However, when setting up a computer it’s important that the need for suitable access is first considered. Making the correct choice involves careful consideration of the individual's needs and an opportunity to try possible solutions. 

In today's classroom, whether in a special school or mainstream, including all learners in all situations can be a real challenge. At least as far as ICT is concerned there are practical solutions that can be applied to meet a variety of needs.