Eye 4/7 Flashcards
Lens
Function: Focuses light on the retina.
Location: Behind the iris and pupil.
Sclera
Function: Protects and maintains the shape of the eye.
Location: The white part of the eye.
Cornea
Function: Refracts light to help focus.
Location: The clear front part of the eye.
Choroid
Function: Provides nourishment to the retina.
Location: Beneath the retina, part of the vascular layer.
Ciliary Body
Function: Adjust the shape of the lens to focus. Contains the ciliary muscle and the ciliary process.
Location: Surrounds the lens
Ciliary Muscle
Function: Smooth muscle is found within the ciliary body. Alters the shape of the lens with contraction and relaxation.
Location: Surrounds the lens.
Ciliary Process
Function: Radiating folds of the ciliary muscle. Capillaries of the ciliary process form the aqueous humor by filtering plasma.
Suspensory Ligament
Function: Helps hold the lens of the eye in place, and connects the ciliary body to the lens, allowing the lens to change shape for focusing on objects at different distances.
Location: Between the ciliary body and the lens
Iris
Function: The colored part of your eye. It controls the size of the pupil, which is the black circular opening in the center of the iris. It adjusts the pupil to regulate how much light enters the eye, helping you see clearly in different lighting conditions.
Location: Located directly behind the cornea and in front of the lens. It surrounds the pupil.
Retina
Function: Contains photoreceptors that detect light and convert it to electrical signals.
Location: The inner lining of the eye.
Macula lutea
Function: Responsible for sharp central vision.
Location: Center of the retina.
Fovea centralis
Function: Responsible for sharp central vision.
Location: Center of the retina.
Optic nerve
Function: Transmits visual information from the retina to the brain.
Location: Exits the back of the eye.
Optic disc (blind spot)
Function: No visual receptors, where the optic nerve exits the eye.
Location: Part of the retina.
Ora Serrata
Function: the edge that marks the transition between the photosensitive area of the retina (which processes light) and the non-photosensitive area (which is involved in structural support).
Location: Along the front edge of the retina, near the ciliary body.
The anterior chamber of the eye
Function: The anterior chamber is the space filled with aqueous humor, a clear fluid that nourishes the eye and helps maintain intraocular pressure.
Location: The space in the front part of the eye, between the cornea and the iris.
The posterior chamber of the eye
Function: A smaller, fluid-filled space, it is also filled with aqueous humor, which helps maintain intraocular pressure and provides nutrients to the lens and cornea. Plays a role in maintaining the eye’s shape and supporting the movement of the lens for focusing.
Location: Behind the iris but in front of the lens. It is connected to the anterior chamber by the pupil.
Aqueous humor
Function: Provides nourishment to the cornea and lens, which do not have blood vessels. It helps maintain intraocular pressure, which is the pressure inside the eye, keeping the eye’s shape and structure intact. It drains waste products from the eye.
Location: Fills both the anterior and posterior chambers of the eye
Vitreous humor
Function: It helps maintain the shape of the eyeball and provides structural support.
It helps hold the retina in place, keeping it attached to the back of the eye. Helps to transmit light to the retina for vision.
Location: In the posterior segment of the eye, filling the space behind the lens and in front of the retina, all the way to the optic nerve.
Occipital lobe
Function: Processes visual information. It interprets signals sent from the eyes to help us recognize shapes, colors, motion, and depth.
Location: At the back of the brain, just above the cerebellum and below the parietal lobe.
