What forms the embryological nucleus of the lens?

Study for the NBEO Ocular Physiology Exam. Utilize flashcards and multiple-choice questions to enhance your learning. Prepare effectively for your certification!

The embryological nucleus of the lens is formed by the primary lens fibers, which develop from the posterior lens epithelium. During lens development, the lens placode invaginates to form the lens vesicle, and the cells at the posterior part of this vesicle elongate to form the primary lens fibers. These fibers then fill the lens and are critical for the structure of the lens, contributing to its transparency and refractive properties throughout life. The primary lens fibers continue to be formed throughout early development and ultimately constitute the innermost part of the mature lens, known as the embryonic nucleus. This structure is pivotal for the lens's function in focusing light onto the retina.

In contrast, the other choices refer to different components associated with the lens. The lens capsule is a thin, elastic membrane that encloses the lens but does not form the embryonic nucleus. Anterior lens epithelial cells give rise to secondary lens fibers, which surround the nucleus but do not form it. The outer layer of the lens is primarily composed of these secondary fibers and is not involved in forming the embryonic nucleus either. Thus, the primary lens fibers, originating from the posterior lens epithelium, are rightly identified as the embryological nucleus of

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