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Sheep eye lens capsule with ligaments attached. The capsule is lifting off the lens showing cell fiber ends beneath. Microscope image of lens capsule in relation to lens cell types. The lens capsule is a component of the globe of the eye. [1] It is a clear elastic basement membrane similar in composition to other basement membranes in the body.
The eyes begin to develop as a pair of diverticula (pouches) from the lateral aspects of the forebrain.These diverticula make their appearance before the closure of the anterior end of the neural tube; [1] [2] after the closure of the tube around the 4th week of development, they are known as the optic vesicles.
During embryonic development of the eye, the outer wall of the bulb of the optic vesicles becomes thickened and invaginated, and the bulb is thus converted into a cup, the optic cup (or ophthalmic cup), consisting of two strata of cells.
This enclosed structure is the lens vesicle. [1] Studies have shown that lens development requires the presence of the Pax6 gene, which is the master regulatory gene for eye morphogenesis. [ 11 ] This master regulatory gene is not necessary for the closely associated optic vesicle development. [ 12 ]
Note the largest lens has damaged capsule and iris attached Microscope image of lens cell types and capsule. The lens has three main parts: the lens capsule, the lens epithelium, and the lens fibers. The lens capsule is a relatively thick basement membrane forming the outermost layer of the lens. Inside the capsule, much thinner lens fibers ...
The lens placode invaginates to later develop the lens or lens pit. The development of the lens placode is typically seen between 44 and 50 hours; invagination occurs shortly after at around the 50–55-hour mark. (Mouse) [1] Both the formation of the lens placode, and the invagination of this to the lens pit are both morphogenetic events. [2]
The ciliary body is a part of the eye that includes the ciliary muscle, which controls the shape of the lens, and the ciliary epithelium, which produces the aqueous humor. The aqueous humor is produced in the non-pigmented portion of the ciliary body. [ 1 ]
It gives the surgeon access to the lens inside so that it can be removed. The remaining part of the capsule is left in place and provides a barrier between the anterior and posterior chambers that prevents leakage of the vitreous into the anterior chamber, and provides a natural support for an implanted intraocular lens in the optimum position. [2]