Chapter 13 PresentationThe Eye and Ear
By: Stacey Smith
Pressure Equalizing Tube (PE Tube)
This is needed when the Eustachian Tube is not functioning properly.
This can cause Serous Otitis Media
After making an incision in the eardrum and suctioning out any middle ear fluid, a tiny hollow tube made of plastic or metal is inserted into the eardrum. Over time, the tube is pushed out as the eardrum heals. A pressure equalization tube usually provides middle ear ventilation for 6 to 12 months. Often, the Eustachian tube will have recovered by this time and the pressure equalization tubes need not be replaced
Eyes, Ears, Nose, Throat (EENT) Eyes are organs that
detect light, and transmit external images to via optic nerve to the brain
Ears is the organ that detects sound
Nose is the organ use to detect smell
Throat is the anterior part of the neck, in front of the vertebral column. It consists of the pharynx and larynx
Bone Conduction (BC) Bone conduction is the transmission of
sound to the inner ear through the bones of the skull
Both Ears (AU) Vertebrates have a pair of ears, placed
symmetrically on opposite sides of the face
This arrangement aids in the ability to localize sound sources
Otitis Media (OM) is inflammation of the middle ear, or
middle ear infection Otitis media occurs in the area between the
tympanic membrane (the end of the outer ear) and the inner ear, including a duct known as the eustachian tube
Emmetropia (EM) Describes the state of vision where an object
at infinity is in sharp focus with the eye lens in a neutral or relaxed state
This condition of the normal eye is achieved when the refractive power of the cornea and the axial length of the eye balance out, which focuses rays exactly on the retina resulting in perfect vision
An eye in a state of emmetropia requires no correction
Exotropia (X) is a condition of
strabismus where the eyes are deviated outward
Strabismus is a condition in which the eyes are not properly aligned with each other
Left Eye (OS)
Extraocular Movement (EOM) The extraocular muscles are the
six muscles that control the movements of the (human) eye. The actions of the extraocular muscles depend on the position of the eye at the time of muscle contraction.
Visual Acuity acuteness or clearness of vision,
especially form vision, which is dependent on the sharpness of the retinal focus within the eye and the sensitivity of the interpretative faculty of the brain
a measure of the spatial resolution of the visual processing system and is usually tested in a manner to optimize and standardize the conditions
Refrences: Medical Terminology A Living Language www.summitmedicalgroup.com www.kidshealth.org