Our focusing ability is greatest in childhood and progressively declines throughout most of our life until after age forty, the focus has declined to require reading lenses or bifocals. Trauma to the brain may reduce the ability to focus accurately in young people and may lead to the need for reading correction or bifocals. Spasms of accommodation may occur causing over focusing and may present as a temporary increase in myopia.
Post Trauma Vision Syndrome may impair our ability to interpret spatial relationships and accurately coordinate the focus and convergence mechanism.