Touch receptors are more densely packed in areas better at localising touch

B and C

A and C

Touch receptors are less densely packed in areas better at localising touch

Some touch receptors are better at localising touch than others

A comparison of the direct and consensual pupillary constriction to look for a difference in the afferent pathways

A comparison of the amount of accommodation in the two eyes to look for a difference in force of ciliary muscles in the two eyes

A comparison of the amount of accommodation in the two eyes to look for a difference in the afferent pathways

A relative measure of the pupils of the two eyes at rest with no light

A relative measure of the pupils of the two eyes at rest with bright light in both eyes

Merkel's disks

Hair follicle receptors

Bare nerve endings

Muscle spindle capsules

Pacinian corpuscles

The fine touch neurons coming from the fingertips have much smaller receptive fields

More of the brain is devoted to processing body areas important in keeping us upright like the calf muscles.

There are more fine touch receptors in the fingertips than in the calves AND The fine touch neurons coming from the fingertips have much smaller receptive fields.

The fine touch receptors in the fingertips have much larger receptive fields

There are more fine touch receptors in the fingertips than in the calves.

Measure the size of the blind spot

Use the Bjerrum screen to measure the blind spot

Shone a light in one eye and examine the pupil in the other eye

Ask a person to switch from looking at a distant object to looking at a near object

Ask a person to switch rapidly from looking at a near object to looking at a distant object

The changes in the lens structure that allow near vision

The size of the pupillary aperture

The pupillary respsonse in the eye other than the one into which light is shone

The changes in the lens due to ciliary muscle contraction

The changes in the lens structure that allow distance viewing