Nystagmus causes involuntary eye movements that can vary in speed. Depending on the severity, it may affect one or both eyes. To compensate, you may find yourself keeping your head in unusual positions in an attempt to focus on the visual target. If you develop nystagmus in adulthood, the world may also seem to move when you look around. In some cases, the condition may also affect your vision. More specifically, you may be sensitive to bright lights or have a difficult time seeing in the dark.

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