Fundamental of Retina

Question 1

What is the total volume of Vitreous

Answer 1

4 ml

Question 2

How many percent water are composed for Vitreous

Answer 2

99 %

Question 3

What is the function of vitreous ?

Answer 3

Metabolism for Intraocular tissue ex Lens CB and Retina

Question 4

Why Vitreous has 2x Viscocity than water ?

Answer 4

Mucopolysaccharide , HA

Question 5

Describe Ultrastructural level of Vitreous

Answer 5

Collagen type II and Cells

Question 6

What is Hyalocyte originate from ?

Answer 6

Modified histiocyte , glial cell , fibroblast

Question 7

Describe Vitreous base ?

Answer 7

Located 2 mm anterior to Ora Serrata
4 mm posterior to Ora Serrata

it is Fibril merge with basal lami a of non pigemented epithelium of pars plana and ILM

Question 8

Strong Vitreous attachments site ?

Answer 8

Vitreous Base
Disc Margin
Perimacular area
Along retinal vessels
Periphery of posterior lens capsule

Question 9

How Cloquet canal form ?

Answer 9

Regression of Hyaloid Vasculature .

Question 10

What is Mitterndof dot ?

Question 11

What is Bergmeister papilla ?

Question 12

When is Primary Vitreous is form ?

Answer 12

WK 4,5 to mo 2

Question 13

Describe Secondary vitreous ?

Answer 13

Begin after primary vitreous is establish , its is avascular consist of type II collagen and hyalocyte ,

Question 14

Describe tertiary vitreous ?

Question 15

2 Basic function of Vitreous

Answer 15

1.Major volume of globe
2.Route of nutritions to lens

Question 16

Composition of Vitreous

Answer 16

Water
Macromolecules
Solid Matter
Hyaluronidasr and MMP2

Question 17

Collagen type of Vitreous

Answer 17

1.Type 2 - Major Component
2.Type 9
3.Type 5,6

Question 18

Naming Associated protein of Vitreous ?

Answer 18

1.Albumin > Major
2.Transferrin
3.glycoprotein
4.Neutrophil elastase inhibitor : resit NV
5.tPA

Question 19

Zonular fibers composed of ?

Answer 19

Fibrillin

Question 20

What is the barrier of Retina ?

Answer 20

• Vascular endothelium of retinal vessels
• RPE
• Inner layer of ciliary epithelium

Question 21

What Axl is consider Myopia

Answer 21

26 mm

Question 22

How many Layers of Retina ?

Answer 22

10 neuro Layers + RPE

Question 23

List the retinal layer from inner to outer ?

Answer 23

ILM
RNFL
GCL
IPL
INL
MLM
OPL
ONL
ELM
PR
——
RPE

Question 24

Describe RPE ?

Answer 24

Monolayer of Hexagonal cells
Optic disc to ora serrata

Question 25

Fx of RPE

Answer 25

1.VitA metabolism 2.Outer BRB 3.Phagocytosis 4.Absorb of light 5.Heat exchange

Question 26

What 3 elements compose of neurosensory retina ?

Answer 26

1.Neuronal elements 2.Glial Elements 3Vascular Elements

Question 27

Neuronal Elements of Retina ?

Answer 27

1.cone and Rods 2.Connections Cells - Horizontal - synaps rod and cone - It in OPL - Bipolars - Vertically - synapse rod cone with gc and amacrine cells in IPL

Question 28

Glial elements of retina ?

Answer 28

- Muller cells ELM to ILM > Structural support and Nutrition

Question 29

Vascular elements of Retina ?

Answer 29

CRA Colioretinal artery

Question 30

Describe Macula ?

Answer 30

With in tenporal arcade with >1 layer of GC

Question 31

What is Macula lutea ?

Answer 31

Yellow spot > Carotenoid pigment from Lutein and Zeaxanthin Central : Cone dense area Peripheral : Rod dense area

Question 32

Blood supply of Retina ?

Answer 32

2/3 inner from CRA ( opthalmic ) . 1/3 outer + RPE Choriocapillaris from choroid .

Question 33

Distance from limbus to ORA

Answer 33

Nasal 5.7 Temporal 6.5 Superior 6.1 Inferior 6.2 inferior oblique muscle at sclera = Macula