Mechanisms and defects of sight and hearing and

What is the correct sequence (order) of how we are able to see?

• Optic Nerve - Retina - Lens - Cornea

• Cornea - Retina - Lens - Optic Nerve

• Lens - Cornea - Retina - Optic Nerve

• Cornea - Lens - Retina - Optic Nerve

  SHOW ANSWER

Which two parts of the structure of ear are not involved in the mechanism of hearing?

• Oval window

• Eustachian tube

• Earlobe

• Semicircular canals

There are tiny nodules found on the surface of your tongue is known as

• Taste buds

• Taste receptors

• Papillae

• Pore

What is the biological explanation for the blind spot in the eye?

• There is no retina in this spot.

• There is just a hole in the back of the eye.

• There are no photoreceptors here.

• This is just a myth.

What is an optical illusion?

• A really cool drawing.

• A picture of something you can't explain.

• Something that tricks your mind and your eyes into believing something is happening when it really is not.

• It is something similar to a landscape.

Choose the correct equipment to overcome the limitation of sight (2 answers)

• 
• 
• 
• 

What are the two factors that cause short-sightedness?

• Eye lens too thick

• Eye lens too thin

• Eyeball too short

• Eyeball too long

Short-sightedness can be corrected using

• Convex lense

• Concave lense

• Eye lense

• Cylindrical lense

A person who suffers from long-sightedness is unable to see ______ objects clearly.

• left

• right

• near

• far

Near objects appear blurry for a person who suffers long-sightedness because the image is focused ________ the retina.

• at the side

• away from

• in front of

• behind