The components of adult astigmatism and their age-related changes.
Jos J RozemaSarah HershkoMarie-José Tassignonnull nullPublished in: Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) (2019)
In young participants corneal and internal astigmatism partially cancel each other out. This balance between both is gradually lost after age 50, leading to larger amounts of refractive astigmatism, as well as a reorientation of the axis. Given the small amplitude of these changes, they are unlikely to have repercussions for long term stability toric cataract or refractive surgery outcomes.