Quiz 13-03-22 (Part One)
Corneal and Ocular Health Quiz
Test your knowledge on corneal anatomy, eyelid fun
Key areas covered:
- Corneal structure and fun
ction - Types of blepharitis
- Allergic conjunctivitis symptoms
- Effective treatments and hygiene practices
1. The cornea provides _____ (40-46 diopters) of the refractive power of the eye
1/4
1/3
1/2
2/3
2. The cornea is made up approximately 1/6 of the external eye, with sclera making up to the other 5/6. The junction of the cornea and the sclera is known as _____. The anatomical _____ lies slightly posterior to the surgical _____.
Grey's line
Limbus
Eyelid margins
Anterior chamber angle
3. The cornea is a transparent anterior segment of the eyeball. It has three main functions:
Light transmission, lubrication and protection
Light refraction, lubrication and protection
Light transmission, light refraction and protection
Light refraction, light transmission and lubrication
4. The pre-corneal tear film:
1 layer
2 layers
3 layers
4 layers
5. The cornea is a multi-layered structure consisting anterior to posterior of:
Epithelium, Bowman, stroma, Dua's layer, endothelium
Endothelium, Descemet's layer, stroma, Bowman, epithelium
Epithelium, Bowman, stroma, Descemet's layer, endothelium
Endothelium, Dua's layer, stroma, Bowman, epithelium
6. Histology of the corneal epithelium:
Keratinized stratified squamous epithelium
Keratinized non-stratified squamous epithelium
Non-keratinized stratified squamous epithelium
Non-keratinized non-stratified squamous epithelium
7. The source of new epithelial cells in corneal wound healing:
Palisades of Vogts
Limbal stem cells
Corneal basal and wing cells
Conjunctival goblet's cells
8. In corneal epithelium, microvilli and microplicae are attached to "mucin layer" by ______, which is produced by the corneal epithelial surface cells in order to bind moving to corneal surface.
Keratocytes
Glycocalyx
Glycosaminoglycan
Laminin
9. To maintain corneal transparency by controlling stromal hydration by contributing a fixed negative charge of the stroma. Normally, stroma is _____ hydrated.
76%
77%
78%
79%
10. In corneal transparency: If the stroma becomes overhydrated, or distorted by injury or scarring, this regular architecture and transparency are lost and the stroma becomes ______.
Clear
Opaque
Quiet
Disorganized
11. The orbicularis oculi muscle closes the eye (blinking) and is innervated by the _____ cranial nerve.
2nd CN
3rd CN
6th CN
7th CN
12. Tarsal plates are the ______ which gives shape to the lids and contain tarsal glands.
Soft layer
Hard layer
Membranous layer
Aponeurotic layer
13. The meibomian glands lies _____ in parallel row through the tarsus.
Horizontally
Vertically
Transversely
In oblique line
14. Anatomically, blepharitis can be divided into ____ and ____ blepharitis.
Anterior and posterior
Interior and exterior
Medial and lateral
Infectious and non-infectious
15. The lid margin appear to be hyperemic and greasy with soft scales and adherence of lashes to each other.
Staphylococcal blepharitis
Seborrhoeic blepharitis
Demodex infestation
Meibomian gland dysfuntion
16. Characteristics: Meibomian gland capping with oil globules, toothpaste-like materials upon gentle pressure and telangiectasia of the posterior lid margin.
Staphylococcal blepharitis
Seborrhoeic blepharitis
Demodex infestation
Posterior blepharitis
17. There are hard scales or crusting around the bases of the lashes and are associated with collarettes.
Staphyloccocal blepharitis
Seborrhoeic blepharitis
Demodex infestation
Posterior blepharitis
18. To keep a good hygiene of the eyelids, doctor always advise patients to practice ____ to soften crusts at the bases of the lashes.
Cool compresses
Eyelid cleansing
Warm compresses
Instill antibiotics
19. In routine, ______ is helpful for associated or complicated tear insufficiency and instability.
Topical steroid
Topical antibiotics
Plant and fish oil supplement
Tear substitutes
20. _____ could be one of the complications of (chronic) blepharitis.
Cataract
Chalazion
Anterior uveitis
Choroiditis
21. Ocular itching is the hallmark symptoms of the ______ allergic conjunctivitis.
Parennial
Seasonal
Vernal
Atopic
22. Horner-Trantas dots are usually found in _____ allergic conjunctivitis.
Vernal
Atopic
Giant papillary
Seasonal
23. The sight-threatening complication(s) in keratopathy by the atopic keratoconjunctivitis:
Shield's ulcer
Persistent epithelial defects
Peripheral angle vascularization
Symblepharon
24. The cobblestones present in _____ (allergic eye diseases).
Seasonal allergic conjunctivitis
Vernal keratoconjunctivitis
Giant papillary conjunctivitis
Contact allergic conjunctivitis
25. Key cells in allergic eye diseases:
The mast cells
The Langerhans' cells
Histamine
Acetylcholine
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