Elsevier eBooks+ Activation

eBook Access and Information

• Transferring eBook access to another party is not allowed, and it will result in termination of access to the eBook.
• The first step to activate the eBook version of STEINERT’S Cataract Surgery is to scratch the box below to reveal the PIN.
• The PIN required for eBook activation can be found in the box.

Editors and Institutions

• Dr.Namrata Sharma is not listed as an editor or associate editor of STEINERT’S Cataract Surgery.
• Dr.Roger F. Steinert is the Vice Chair of Clinical Ophthalmology at the Gavin Herbert Eye Institute.
• The Cullen Eye Institute is located at Baylor College of Medicine.

Book Information

• The latest edition of Steinert’s Cataract Surgery is the Fourth Edition.
• There were three previous editions of the book copyrighted before 2023.
• The book 'Steinert’s Cataract Surgery' was printed in the United States.
• The Content Strategist for the publication is Michael W. Korn.
• The ISBN of 'Steinert’s Cataract Surgery, Fourth Edition' is 978-1-975-144-54-9.

Lens Embryogenesis

• Practitioners and researchers must rely on their own professional judgment and clinical experience when using the information provided in the book.
• The initial action that induces the surface ectoderm to thicken and differentiate into a lens precursor is the interaction with the optic vesicle.
• At the 3-week stage, the lens vesicle breaks off the stalk, connecting it to the surface ectoderm.
• The outer basement membrane of the lens vesicle hypertrophies to become the lens capsule.
• By the end of week 4 of gestation, the posterior cells of the lens vesicle rapidly elongate to form primary lens fibers.
• As the lens pit continues to invaginate, it forms a lens vesicle.
• The optic vesicles are the structures that induce the surface ectoderm to form a lens precursor.
• The shape of the adult lens is biconvex.
• During the 4-8 week stage of gestation, the lens fibers form the fetal nucleus.
• The role of the retina in lens embryogenesis is to induce the formation of the lens precursor.
• The structures that form Y-shaped sutures unique to the fetal growth stage at around week 8 are the lens fibers.
• The hyaloid artery supplies nutrients to the lens during fetal development.
• During accommodation, the lens becomes more spherical due to the contraction of the ciliary muscles.
• The nutritive structure supplied by the hyaloid artery during fetal development is the lens.
• At around age 20-30, the lens changes shape from a slightly rounded ovoid to a more flattened ovoid.
• The approximate diameter of the adult lens is 9-10 mm.

Learn how to activate the eBook version of your Elsevier title at no additional charge. Follow the simple steps to unlock access to your eBook and customize your reading experience.