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Flashcards in Week 1 Deck (77)
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1

What does aqueous fluid do for the anterior and posterior chambers of the anterior cavity?

Provide nutrients and oxygen to the lens and the cornea

2

Aqueous fluid is produced from?

Ciliary Processes in the posterior chamber

3

Vitreous fluid is produced from?

Non-pigmented area of the ciliary body

4

OIA and CN of Superior Oblique

O- Sphenoid bone
I- Sclera deep to the superior rectus
A- Depresses, intorsion, and abducts eye

Innervated by the Trochlear Nerve (CN4)

5

OIA and CN of Inferior Oblique

O- Anterior part of orbit floor
I- Sclera deep to the inferior rectus
A- Abduct, elevates, and extortion of eye

Innervated by the Oculomotor Nerve (CN3)

6

OIA and CN of Superior Rectus

O- Tendinous ring
I- Sclera behind the corneoscleral junction
A- Elevates, adduction, and intorsion of the eye

Innervation by the Oculomotor Nerve (CN3)

7

OIA and CN of Inferior Rectus

O- Tendinous ring
I- Sclera behind the corneoscleral junction
A- Depresses, adducts, and extortion of the eye

Innervated by the Oculomotor Nerve (CN3)

8

OIA and CN of the Medial Rectus

O- Tendinous ring
I- Sclera behind the corneoscleral junction
A- Adduction of the eye

Innervated by the Oculomotor Nerve (CN3)

9

OIA and CN of the Lateral Rectus

O- Tendinous Ring
I- Sclera behind the corneoscleral junction
A- Abduction of the eye

Innervated by the Abducens Nerve (CN6)

10

What happens to the pupil when a light is shown into the eye for afferent pupillary defect?

The affected pupil will dilate.

11

What diseases can affect the pupillary reflex?

Alcoholism
Encephalitis
CNS syphilis

12

Define Conjugate Gaze

Use of both eyes to look steadily at an object

13

Define saccadic eye movements

Small jumping movements that represent rapid shift in conjugate gaze orientation

14

Nystagmus

Sequence of slow ocular rotation and/or a saccade

15

Activity of the pupil and lens during sympathetic activity.

Pupil- dilate
Lens- will "flatten"

16

Activity of the pupil and lens during parasympathetic activity.

Pupil- contract
Lens- will bulge

17

Emmetropia

Normal vision- refracts the image perfectly on to the retina

18

Presbyopia

Old Eyes- lens become thicker & less elastic
Need bifocals

19

Hyperopia

Farsightedness- refracts image behind the retina (need a convex lens)

20

Myopia

Nearsightedness- refracts image in front of the retina (need a concave/divergent lens)

21

Disease of the peripheral retina produces what type of color blindness?

Blue color blindness

22

Disease of the central retina produces what type of color blindness?

Red/Green color blindness

23

What is the normal intraocular pressure?

12-20 mmHg

24

Amblyopia

Lazy eye
Dullness or obscurity of sight for no apparent reason
Can lead to strabismus

25

Strabismus

Eye misalignment caused by an imbalance in the muscles holding the eyeball

26

Anisometropia

Condition of the eyes in which the eyes have unequal refractive power

27

Aphakia

Absence of the lens of the eye

28

Asthenopia

Eye strain

29

Convergence

Turning both eyes inwards so that they are both "aimed" towards a near object

30

Cycloplegia

Paralysis of the ciliary muscles of the eye resulting in a loss of accommodation- can not focus on near by objects