For children found to have squint, it is usually parents, family friends, or pediatrician who first notice that a child’s eyes do not appear straight. The red reflection often seen in the pupils of eyes in photographs may appear asymmetrical, which can be a sign of misalignment. Adults who develop squint discover the condition themselves as they develop symptoms of double vision. The physical examination will include a detailed examination of the eyes. The eye muscles will be tested to determine the strength of the extraocular muscles.