Eyeball | Structure, Function & Muscles | Britannica
网页Eyeball, spheroidal structure containing sense receptors for vision, found in all vertebrates and constructed much like a simple camera. The eyeball houses the retina—an extremely metabolically active layer of nerve tissue made up of millions of light receptors (photoreceptors)—and all of the
Human eye - Wikipedia
网页The eyeball grows rapidly, increasing from about 16–17 mm (0.63–0.67 in) diameter at birth to 22.5–23 mm (0.89–0.91 in) by three years of age. By age 12, the eye attains its full size.
Human eye | Definition, Anatomy, Diagram, Function, & Facts
网页2024年8月18日 · Human eye, specialized sense organ in humans that is capable of receiving visual images, which are relayed to the brain. The anatomy of the eye includes auxiliary structures, such as the bony eye socket and extraocular muscles, as well as the structures of the eye itself, such as the lens and the retina.
Eye Anatomy: Parts of the Eye and How We See
网页2023年4月29日 · Eye Anatomy: Parts of the Eye Outside the Eyeball. The eye sits in a protective bony socket called the orbit. Six extraocular muscles in the orbit are attached to the eye. These muscles move the eye up and down, side to side, and rotate the eye. The extraocular muscles are attached to the white part of the eye called the sclera. This is a ...
Eyeball: Structure and function - Kenhub
网页2023年11月3日 · The eyeball consists of three layers; fibrous, vascular and nervous (retina). Functionally, the most important layer is the retina, which receives the external visual stimuli. The posterior pole of the eyeball is connected with the optic nerve (CN II), which conveys the information from the retina to the brain.
Anatomy of the Eye - Johns Hopkins Medicine
网页The muscles that move the eyeball are attached to the sclera. Suspensory ligament of lens. A series of fibers that connects the ciliary body of the eye with the lens, holding it in place.
Eye Anatomy: Parts of the Human Eye - Vision Center
网页2024年2月20日 · The inferior oblique: Arises from the front of the socket near the nose and travels inwards, attaching to the bottom surface of the eyeball; it rotates the eye outwards (front to back) and upwards 10.
EYEBALL中文(简体)翻译：剑桥词典 - Cambridge Dictionary
网页verb [ T ] informal uk / ˈaɪ.bɔːl / us / ˈaɪ.bɑːl / to look closely at someone. 注视;盯;仔细打量. He eyeballed me across the bar. 他在酒吧的另一边盯着我。 同义词. eye. (eyeball在剑桥 …
Structure and Function of the Eyes - MSD Manuals
网页Each eye constantly adjusts the amount of light it lets in, focuses on objects near and far, and produces continuous images that are instantly transmitted to the brain. The orbit is the bony cavity that contains the eyeball, muscles, nerves, and blood vessels, as well as the structures that produce and drain tears.
Anatomy of the eye: Video, Anatomy & Definition | Osmosis
网页To keep this shape, the eyeball needs a solid structure: the fibrous layer, which is made of dense connective tissue and forms the skeleton of the eyeball. This layer has two parts: the one that makes the outer layer of the smaller sphere, called the cornea ; and the one that makes the outer layer of the bigger sphere, called the sclera .