Download e-book for kindle: Development of the Ocular Lens by Frank J. Lovicu, Michael L. Robinson

By Frank J. Lovicu, Michael L. Robinson

ISBN-10: 0521838193

ISBN-13: 9780521838191

This accomplished research of the developmental biology of the ocular lens will function a reference for graduate scholars and examine scientists within the visible sciences and developmental biology, in addition to for ophthalmologists. rationalization of the mechanisms that govern common lens improvement is key to our figuring out of lens problems. The lens has additionally turn into a version for learning extra advanced organ structures. major specialists in lens improvement and constitution speak about lens induction, evolution, phone cycle legislation, morphology, fiber cellphone differentiation, and regeneration.

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Example text

Contraction and relaxation of the ciliary muscles modify the tension on the zonular fibers, altering the shape of the lens for near and far vision, respectively. This brief and by far incomplete review of comparative lens structure and function indicates the extent of adaptive variation seen in vertebrate eyes. One thing that has remained constant amongst vertebrates is the manner in which the different parts of the eye – in particular, the lens – develop, differentiate, and continue to grow throughout life.

Scale bar: (A), 100 µm; (B), 10 µm. in type. They are derived solely from the epithelium and combine a vertebrate-like optical system with invertebrate photoreceptors. 2. The Compound Eye The compound or faceted eye has evolved along a different path from that of the simple eye. Unlike the simple eye, characterised by functionally independent light-sensitive cells, the sensory elements of the compound eye are structurally and functionally associated in groups (Fig. 9). The sensory elements that make up the compound eye, each referred to as an ommatidium, are separated from their neighbours by a mantle of pigment cells.

These texts primarily describe lens morphogenesis during human development. The goal of this text is to provide a more generalised and comprehensive view of lens development across a variety of the more commonly used animal models (see Fig. 13). The lens and the skin share a common embryonic origin; both are derived from the embryonic surface ectoderm. Consistent with this, the lens, like skin, continues to grow throughout life. Although skin is continually being renewed, with its superficial cells being replaced with the progeny of the more basally located stem cells, the cells of the lens are all retained, resulting in the lens becoming larger.

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Development of the Ocular Lens by Frank J. Lovicu, Michael L. Robinson

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