2020–2021 BCSC Basic and Clinical Science Course™
11 Lens and Cataract
Chapter 4: Embryology and Developmental Defects
This chapter includes a related video. Go to www.aao.org/bcscvideo_section11 or scan the QR code in the text to access this content.
The lens is derived from surface ectoderm.
Approximately one-third of congenital cataracts are a component of a syndrome, one-third are an isolated inherited trait, and one-third result from undetermined causes.
Most hereditary cataracts are inherited in an autosomal dominant pattern, and they are almost always bilateral.
Trauma is the most common cause of acquired lens displacement.
A subluxated lens is partially displaced from the pupil but remains in the pupillary area; a luxated or dislocated lens is completely displaced from the pupil.
Excerpted from BCSC 2020-2021 series: Section 11 - Lens and Cataract. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.