These essentially include the following forms:
❖ Esotropia: Inward deviation of the visual axis.
❖ Exotropia: Outward deviation of the visual axis.
❖ Hypertropia and hypotropia: Ocular deviation with one eye higher or lower than the other.
❖ Cyclotropia: This refers to the rotation of one eye around its visual axis. An isolated form of strabismus (i.e., one that does not occur in combination with paralytic strabismus), this disorder is extremely rare and therefore will not be discussed in greater detail.
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