Strabismus refers to the misalignment of the eyes, where one or both eyes may turn inwards, outwards, upwards, or downwards. Esotropia is a specific type of strabismus where one or both eyes turn inwards towards the nose. In essence, esotropia is a subtype of strabismus. If there's any suspicion of eye misalignment, it's essential to consult an eye doctor for a comprehensive evaluation.