C639 Disorders of Vision

Amblyopia ??

Definition

Functional reduction in visual acuity d/t visual disturbances in early childhood
Unilateral (m/c): ?2-line difference in vision between eyes (eg, 20/30 & 20/50)
Bilateral: vision worse than 20/40 at age ?4

Etiology

Strabismus
Asymmetric refractive error
Vision deprivation (eg, cataracts, ptosis)

Management

  • Corrective lenses
  • Encourage use of amblyopic eye
    • Patching eye with better vision
    • Cycloplegic drops to blur normal eye
  • Surgery (eg, cataract removal)

Diplopia

Suppression

Amaurosis

Nyctalopia

Psychogenic Disturbances

Dyslexia

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