Question

1. What is presbyopia? Hyperopia? Myopia?

2. Which cranial nerves assesses eye function and acoustic function?

3. What is the Rinne test? Weber test?

4. Do you or anyone you know have any of the issues/symptoms/conditions mentioned in the video? Is it due to genetics or aging? How is it being managed?

Answer 1

1. Presbyopia is tge gradual loss of eye's ability to focus on near by objects. It occurs due to hardening and loosing flexibility of the lens in the eye.which occurs with aging. Presbyopia can be diagnosed by an eye health assessment (refraction assessment). It can be treated by eye glasses, contact lenses, monovision LASIK, Refractive lens exchange etc.

*hyperopia is a vision condition in which the distant objects can see clearly but close one do not come into proper focus .which occurs due to light rays entering the eye focus behind the retina,rather than directly on it. It can be corrected with glasses or contact lenses.

* Myopia is a vision condition. In which people can see near objects clearly.but they cant able to see the distant objects. It occurs due to light entering theeye us not focusing correctly. This also can corrected by contact lenses.

2.The eye functions are controlled by,

# Abducens, trochlear(.eye movements). # occulomotor( eye movement and pupil reflex) # optic nerve( vision)

*The acoustic functions are controlled by vestibulocochelrar nerve(hearing and balance)

3.Rinne test.

This test is used to evaluate the loss of hearing in one ear. It compares perception of sounds transmitted by air conduction and bone conduction through mastoid. The doctor strikes a tunung fork ans place it on the mastoid bone behind one ear. When you can no longer hear the sound, you can tell to the doctor. Then the doctor moves the tuning fork next to your ear canal.when you can no longer hear that sound you once again tell to the doctor.

* weber test. It is used to assess the hearing. The doctor tap the tuning fork strongly on your palm and the press the but of the instrument on the top of patient's head in the midline. Then ask the patient where they hear the sound. Normally the siund is heared in the centre of the head or equally in both ears. If there us conductive hearing loss, the vibration will be louder on the side with conductive hearing loss. If the patient does not hear the vibration the doctor will attempt again by pressing the but harder on the patients head.