Lecture 19: Vision Through The Lifespan

Question 1

Driving limit in flordia

Answer 1

20/70

Question 2

Answer 2

Question 3

Sharpness of vision, measured by the ability to discern letters or numbers at a given distance according to a fixed standard

Answer 3

acuity

Question 4

What is legal blindness

Answer 4

best corrected >20/200

so you can have someone whos legally blind who can see something

Question 5

Shellen eye chart

Answer 5

Question 6

at what age can a child attend to black and white and contrasting pattern

Answer 6

birth-10 days

Question 7

Know: children can see better lateral vision than midline (head isnt really in midline) at birth - 10 days

Question 8

How many days does it take for a baby to determine mother?

Answer 8

4 days

by sound/smell at birth

Question 9

are eyes more accurate than extremetities at 1 month

Answer 9

yes
* can track w/ eyes better than hands

Question 10

at what are is vision acuity 20/800-20/200

Answer 10

month 1

NOTE: tracking is not smooth but improving

Question 11

at what month is 20/150

Answer 11

month 2

Question 12

NOTE: at month2 greatest visual stability when head is turned to side rather than in midline (because they’re not having to think about keeping hd up)

Question 13

when is baby able to track object 180 degrees?

Answer 13

3 months

Question 14

at what month is vision 20/60

Answer 14

month 3

Question 15

at what month does baby get depth percention

Answer 15

month 6

this normally doesnt start until they start moving

Question 16

at what month can a baby diliniate between colors?
* what 3 colors first

Answer 16

Month 6
* begins as black and white and red

Question 17

What is babies acuity at month 6

Answer 17

20/20

Question 18

conditions of the eyes
* Strabismus
* Myoptia
* Hyperopia
* Astigmatism

Question 19

Eyes do not properly align/converge
* If this happens to kids what happens
* What about adults?

Answer 19

Strabusmus

Children loss = loss of depth perception (think lazy eye)

Adults = double vision

Question 20

What is myopia?

Answer 20

Nearsighted
* can’t see far away

Most common cause of impared vision in people under 40

typically begins in chuldhood

higher risk if parents are nearsighted

Most cases-stabilizes in early adulthood

Difficulty seeing distances

able to see close

S/s
* Squinting
* eye strain
* HA

Question 21

farsightendness

Answer 21

hyperopia
* can see distant objects clearly
* objects nearby may be blurry
* usually is present at birth
* tends to run in families

s/s
* nearby objects may appear blurry
* squnt to see clealy
* eyes strain, uncluding burning eyes, and aching in or around the yes
* generally eye discomfort or HA after prolonged interval close tasks, such as reading, writing, computer work or drawing

Question 22

Cornear irregularly shaped

Causes blurred vision

Affects near and far vision

Answer 22

astigmatism

near and far vision

you also see halos around lights

note: you can have perfect acuity and have an astigmatism

Question 23

at 40’s cant see close up anymore - presbyopia

Question 24

Question 25

illumination

older needs more light to read