Ear tubes, also known as tympanostomy, ventilating, or pressure equalizing tubes, are small tubes surgically placed in the eardrum to help equalize pressure and drain fluid from the middle ear, helping to treat middle ear inflammation or otis media. The document also defines several eye and vision related terms including emmetropia describing normal vision, exotropia referring to an outward turning eye, extraocular movement describing the six muscles that control eye movement, and visual acuity measuring clarity of vision using a Snellen chart.

1. PE TUBE Ear tubes are known by several names -Tympanostomy tubes - Ventilating tubes -Pressure Equalizing tubes

2. EENT Eye, ear, nose and throat.

3. BC Bone Conduction

4. Is a process by which sound waves are transmitted to the inner ear by the cranial bones without traveling through the air in the ear canal

5. AU Both Ears

6. OM Otis Media

7. Inflammation of the middle ear

8. EM Emmetropia

9. An ideal state of the eye, basically normal vision

10. XT Exotropia

11. An outward turning eye. This is another common type of strabismus