Cornea

Question 1

Diameters of the cornea:

Answer 1

Ant-Post: 10.5 mm

Horizontal: 11 mm

Question 2

the thickness of the cornea at the center and periphery:

Answer 2

center: 0.5-0.6 mm

periphery : 0.8-1 mm

Question 3

the thickness of the cornea’s epithelial lining:

Answer 3

50-60 um

Question 4

_____ and the _____ layers CAN regenerate.

Answer 4

Epithelial and decement layers

Question 5

_____, _____ and the _____ layers DO NOT regenerate.

Answer 5

Bowmen, Stroma, endothelial layers

Question 6

Number of endothelial cells?

Answer 6

2500-3000

Question 7

Innervation of the Corena? And clinical meaning.

Answer 7

Ophthalmic Branch of the Trigeminal - HSV spread.

Question 8

Symptoms of Corneal damage?

Answer 8

VP BLAB:

V - Vision dimniuation
P - Photophobia

B - Blepharospasm
L - Lacrimation
A - Algia (pain)
B- Blincking

Question 9

Signs of Corneal damage?

Answer 9

CHIEF:

C - Colour change (grey)
H - Hypopyon 
I - Injection
E - Edema of lids
F - Flare

Question 10

RF for microbial keratitis?

Answer 10

Bowls IN the PIT!

Bullous keratopathy

I - Iatogenic (lens, storids)
N - Nerves ( loss of sensation, facials, dry eye)

P - Post herpetic
I - infections
T - trauma

Question 11

Keratoconus ocular findings:

Answer 11

Keratoconus ocular findings with CONES:

Central scarring & Fleischer ring
Oil drop reflex / Oedema (hydrops)
Nerves prominent
Excessive bulging of lower lid on downgaze (Munson’s sign)
Striae (Vogt’s)

Question 12

Keratoconus ocular findings:

Answer 12

Keratoconus ocular findings with CONES:

Central scarring & Fleischer ring
Oil drop reflex / Oedema (hydrops)
Nerves prominent
Excessive bulging of lower lid on downgaze (Munson’s sign)
Striae (Vogt’s)

Question 13

Keratoconus treatment when glasses don’t work:

Answer 13

SHIFT:

S - Soft CL
H - Hard CL
I - Inserts (Intacs)
F - Flavin (crosslinking)
T - Transplant

Question 14

Transplant types:

Answer 14

PEEK and TALK at your DESK!

PKP (penetrated keratoplasty)
DALK (deep anterior lamellar keratoplasty)
DSEK (descemet stripping endothelial keratoplasty)