However, it is the environment that impacts their visual function rather than their neurology or capacity for vision at that moment. A persons change in visual function when processing visual information in a complex environment, or trying to process a certain complex or unfamiliar visual target likely accounts for what looks like their visual ability changing from one day to the next, or from minute to minute. Feeling tired or unwell may also compound this challenge. For some people with CVI the complexity of the environment, including variables like the complexity and familiarity of the visual input, or processing various forms of secondary sensory input (for instance, sound or touch) may cause them to have difficulty using their vision to their full potential. The amount of sensory input an individual can tolerate without impacting function significantly may change throughout development and person to person. Managing fatigue may reduce fluctuations but does not eliminate them, however utilizing breaks and being well rested may help to increase resilience during these times. Addressing these changes may mean adapting strategies that work for the individual person. For example, When undertaking critical activities, people with CVI should be prepared for their vision to fluctuate, by taking precautions such as always carrying a white cane, if they use one, even if they dont always use it to the fullest. Another example is having very large print available, just in case its needed (For example, consider the consequences of losing vision while giving a public speech).
This also ensures that important things such as letters are not completely hidden behind any scotomas (small defects in parts of the functioning visual field),  and reduces the chances of getting lost in the text. However, the simplification of the view should not be done in such a way that it requires too rapid a movement to navigate around a large document, since too much motion can cause other problems (see above). In viewing an array of objects, people with CVI can more easily see them if they only have to look at one or two at a time. People with CVI also see familiar objects more easily than new ones. Placing objects against a plain background also makes them easier for the person with CVI to see. For the same reason (simplified view), the person may also dislike crowded rooms and other situations where their functioning is dependent on making sense of a lot of visual clutter. Visual processing can take a lot of effort. Often the person has to make a conscious choice about how to divide mental effort between making sense of visual data and performing other tasks. For some people, maintaining eye contact is difficult, which can create problems in Western culture (for example, bonding can be difficult for some parents who have an infant with CVI, and lack of contact in an older child can cause others to regard him or her with suspicion).