There is a lag time between the end of a comment and the end of the interpretation into sign language. Ninety percent of individuals who are identified as legally blind have some useful vision or light perception. Total darkness is rare. Visual disabilities are so varied that it is often difficult to detect such a student in the classroom or on the campus. However, in many cases some form of assistance is needed.
Some students use aids such as guide dogs.
These dogs are trained to move at the direction of their masters and are well-disciplined to function in group settings. It is important to note that guide dogs are not to be petted or distracted in any way while they are on duty. Guide dogs are allowed by law in all college buildings, including laboratories, food services areas, classrooms and administrative offices. Other students may use white canes, and a few use special electronic sensing devices to enhance mobility. Some students use magnifying devices such as telescopes or binoculars.