Unit 3 - Age Related Changes in Smell, Taste, and Tactile Threshold + vision Flashcards
1
Q
When does reduced sense of smell and ability to distinguish smell usually begin?
A
60 years
2
Q
What is tactile threshold?
A
sensitivity of fingertips
3
Q
Does tactile threshold increase or decrease with age? What age does it begin?
A
- increase
- age 20
4
Q
What occurs to the external eye as you age? ie. structure (4)
A
- loss of orbital fat
- lower eyelid changes in relaxation
- narrowing of the tear duct and reduced production of tears
- decrease in goblet cells that provide mucin
5
Q
The loss of orbital causes senile _____. What is that?
A
- senile ptosis
- drooping of the upper lid
6
Q
Lower eyelid changes relaxation. This causes what 2 occurrences?
A
- ectropion
- entropion
7
Q
What is ectropion?
A
- turning outward of the lower lid
8
Q
What is entropion?
A
- prolonged turning inward of the inward
9
Q
Decrease in the goblet cells that provide mucin causes what syndrome?
A
dry eye syndrome
10
Q
What is dry eye syndrome? (3) ie symptoms
A
- irritation and inflammation
- keratoconjunctivitis
- sicca
11
Q
What age-related changes occur in the internal eye (ocular)? (5)
A
- cornea becomes opaque and interferes with passage of light
– lens becomes stiffer and more opaque, decreased response - iris becomes less flexible
- pupil less resoponsive
- atrophy of ciliary muscles, causing less function
12
Q
What are age related changes in the internal eye (intraocular) structure and NS? (4)
A
- thinning and sclerosis of retinal blood vessels
- Number of rods diminish and associated nerves at the periphery of the retina is reduced
- can be artherosclerosis
- degeneration of neurons in the visual cortex, causing slower processing of visual info
