2020–2021 BCSC Basic and Clinical Science Course™
11 Lens and Cataract
Chapter 2: Anatomy
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 contributes approximately 20.00 diopters (D) of the 60.00 D of power of an average eye.
The anterior curvature of the lens increases with age, causing increased myopia. At the same time, the index of refraction decreases, which may make the eye more hyperopic.
The central pole of the posterior lens capsule measures 2–4 μm thick.
See BCSC Section 2, Fundamentals and Principles of Ophthalmology, for additional discussion and illustrations of the topics covered in this chapter.
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.