visual system

Ciliary Body

Ciliary Body The structure indicated is the ciliary body. The eyeball consists of a fibrous outer layer, a vascular layer, and an inner layer. The vascular layer of the eyeball consists of: Choroid Ciliary body Iris The ciliary body is triangular in cross-section and encircles the eyeball. It has two components: Ciliary muscle Ciliary processes The ciliary body has three main functions: Accommodation of the lens Production and resorption of aqueous humor Maintenance of lens zonules

Ciliary Body

Optic Tract

Optic Tract The structure indicated is the optic tract. The pathway of light from the retina to the occipital cortex is as follows: Retina Optic nerve Optic chiasm Optic tract Lateral geniculate body Optic radiation Occipital cortex There are two optic tracts, a right and a left optic tract. The optic tract is an extension of the optic nerve, conveying information from the optic chiasm to the lateral geniculate nucleus. The optic tracts convey information from the opposite visual field – the right optic tract will convey information from the left visual field, and vice versa. The right optic tract …

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Optic Tract