It is a convenient way to express the full range of sound pressures we can hear

It is what the ear is most sensitive to

It is directly related to pitch so we can easily see where hearing loss occurs

It is a logarithmic scale

It allows us to express the hearing thresholds relative to normal hearing sensitivity

Increase both light entry and spherical abberration

Reduce light entry but increase accommodation

Reduce light entry and decrease spherical abberration

Increase light entry and reduce spherical abberration

Reduce light entry and increase spherical abberration

The pupils will always dilate simultaneously

The pupillary constriction in the eye in which the light is shining at any time should always be greater

There should be no pupillary constriction in either eye

The pupillary constriction in the eye in which the light is shining at any time should always be lesser

The pupillary constriction in both eyes should not change

The measure of the amount of hypermetropia

The measure of the amount of myopia

The measure of how much the lens can change to allow near vision

The measure of how the size of the blind spot

The measure of how much the lens can change to allow far vision

Meissners corpuscles alone

Merkels disks alone

Pacinian disks and corpuscles

Pacinian corpuscles and Meissner's corpuscles

Meissners corpuscles and Merkels disks

Meissner’s corpuscles

Merkel discs

Hair Follicle receptor

Thermo receptors

Pacinian Corpuscles

Indicates a noisy room 

Indicates a cochlear hearing loss

Indicates a mixed middle ear-cochlear hearing loss

Is exactly what you expect for normal hearing

Indicates a middle ear hearing loss