Alternating exotropia with V pattern

This code describes a type of strabismus where one eye deviates outward (exotropia), and the deviation alternates between the eyes. The "V pattern" indicates that the exotropia is greater in upgaze and lesser in downgaze, forming a V shape when observing eye alignment.

Assign this code when documentation clearly specifies alternating exotropia with a V pattern. This typically occurs during an ophthalmological examination where the pattern of deviation is measured and noted. Supporting documentation would include findings from ocular motility testing and prism cover tests.

• Differentiate from intermittent or constant exotropia without a specified pattern.
• Ensure the "alternating" and "V pattern" components are explicitly documented to support this specific code.
• Do not confuse with A pattern exotropia, which has a different vertical deviation characteristic.