This rare pattern is a variant of A-pattern exotropia. In λ-pattern strabismus, the horizontal deviation is the same in primary position and upgaze but increases in downgaze. The λ pattern is usually associated with ODAd.
Excerpted from BCSC 2020-2021 series: Section 10 - Glaucoma. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.