Limiting fatigue will help students perform better. Break tasks up into shorter time periods to give their eyes a rest and limit visual fatigue. Extended time may also be necessary for a child to complete a task. Children can and need to be taught to wait for their eyes to adjust to changes in lighting. This is most true if going from outdoors to indoors and visa versa.
Children can learn to view in different ways to maximize their residual vision.
The most obvious is distance. Getting closer to or farther away from the object or person to be seen may make it easier. Some children tilt their heads to get the visual material at an ideal angle. They may also do this by moving the material. Lighting interacts with many other factors but most importantly with contrast.