NURS 190: Physical Assessment-Ears, Nose, Mouth, and Throat & Eyes and Vision 2023 UPDATED

NURS 190: Physical Assessment-Ears, Nose, Mouth, and Throat & Eyes and Vision 2023 UPDATED @Layers of the Eye correct answers *Sclera* -Cornea *Choroid* -Iris -Pupil *Retina* -Optic Disc -Macula Layers of the Eye (*Sclera*) correct answers *Sclera*:The outermost layer -Is extremely dense, hard, fibrous membrane -Maintains the shape of the eye *Primary function*: To support and protect the structures of the eye *Cornea*: clear, transparent part of the sclera and forms the anterior 1/6th og the eye *Primary function*: -lets light enter -responsible for: >blink reflex >increased tear secretion -Most sensitive to pain Layers of the Eye (*Choroid*) correct answers *Choroid*: The middle layer & vascular pigmented layer of the eye *Iris*: Circular colored, muscular aspect at the anterior in this layer of the eye *Pupil*: Center of the iris an opening called the pupil allows light to travel into the eye. It will change according to how much light is exposed -Mydriasis= opening=more light in/dark area -Miosis=closing=less light in/bright area Layers of the Eye (*Retina*) correct answers *Retina:* The most inner most layer -sensory portion of the eye (Direct to the optic nerve) -made of rods and cones (receivers) *Optic disc*: Creamy yellow point where the nerve and retina meet *Macula*: Responsible for central vision, it is a pit with the center called fovea centralis Visual Pathways correct answers Light is sent through the refraction structures into the eye to be received and converted into information From each optic nerve (II) the info will cross the optic chiasm to the opposite optic tract Left eye will send its information to the right portion of the occipital lobe Right eye will send its information to the left occipital lobe Refraction correct answers Bending of light waves -Responsible for vision Structures responsible for refraction correct answers Cornea Aqueous humor Crystalline lens Vitreous humor Accessory structures (of the eye) correct answers *Eyebrows* *Eyelashes* *Eyelids* *Meibomian glands* *Conjunctivae* *Lacrimal apparatus* Accessory structures (*Eyebrows*) correct answers The coarse short hairs that are located on the lower portion of the forehead at the orbital margins The primary function of the eyebrow is to protect the eye Accessory structures (*Eyelashes*) correct answers Hairs that project from the eyelids and curl outward Accessory structures (*Eyelids*) correct answers aka palpebrae