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Neuro Histology > Eye histology > Flashcards

Eye histology Flashcards

1
Q

Layers of eye ?

A

1- external: sclera , cornea & limbus
2- mid layer: uvea ,( coroid, ciliar object, iris
3- internal layer : retina

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2
Q

T. Fibrosa?

A

External layer

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3
Q

T. Vasculosa ?

A

Mid layer

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4
Q

T. nervosa

A

Retina

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5
Q

Eye sections ?

A

1 -front room: cornea, iris lens
2- back room: iris, ciliar object , zondler ligament , lens aqueous humour)
3- corpus vitreum: lens, zonular ligament , retina (vitrous humour )

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6
Q

Develops from surface ectoderm ?

A

Lens, cornea epithelium , conjunctiva epithelium, tear glands

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7
Q

Originates from neural ectoderm

A

Retina, iris , ciliar object epithelium , pupil muscles , optic nerve

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8
Q

Originates from mesoderm?

A

Sclera, iris , ciliar object , cornea stroma , coroid optic nerve , vitrous object orbita

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9
Q

T.fibrosa ?

A

Sclera & cornea

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10
Q

Sclera?

A

3 layers
No vein
5/6 of eye

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11
Q

Sclera layers?

A

1- episclera
2- substantia propria (tennon capsule)
3- supracoroidal lamina (connects coroid)

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12
Q

Cornea layers?

A 
1-cornea epithelium
2-bowman membran
3- stroma or substantia propria
4- descement membran
5- cornea endothel
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13
Q

Cornea layer 1,2?

A

1- cornea epithel: multilayer non-cheratinised epithel , many free nerve ending
2- bowman membran: bacterial invasion

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14
Q

Cornea layer 3,4, 5?

A

3- stroma (sp): thin collagen , no vein , few lymphosyte
4- descement membran
5- cornea endothel (limited regeneration)

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15
Q

Limbus ? Duct ?

A

Corneoscleral connection

Schlemn duct

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16
Q

Aqueous humour generated by?

A

Corpus ciliare;pars plicesta

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17
Q

Tunica vasculosa ?

A

uvea
1 -coroid
2- corpus ciliare
3-iris

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18
Q

Coroid layers ?

A

1- brush membran (retina’s pigmented epithel)
2- coriocapiller : nutrities retina
3- coroid stroma :rich by vein

19
Q

Corpus ciliare structures?

A

1- stroma
Ext. layer
Internal vascular area
Shortens the length of circular lens ligament
2 - neuro epithel
Pigmente epithel : faces stroma
Non-pigmented : faces back door, continues with sensorial retina

20
Q

Iris?

A

Continuation of ciliar object

Between front and back doors

21
Q

Iris sides?

A

1-front face : mesenchima originated
2- back face : contains much pigmented cell
3- stroma

22
Q

Lens parts ?

A

A-lens capsule (rich by collagen type 4)
B-lens epithel( subcapsular epithel)
C-lens fibrils (contains kristallin , flensin)

23
Q

Acodomation ?

A

To see near, ciliar muscles strain

24
Q

Corpus vitroum (vitrous object) ?

A

Behind of lens

Contains collagen and hyaluronic acid

25
Q

Tunica nervosa?

A

Retina

26
Q

Retina parts?

A

1- external non-sensorial: single layered , melanin granulled
2- Internal sensorial retina

27
Q

Retina structunes?

A

1- central fovea : where light concantrades

2- macula lutea: yellow frame that surrounds fovea

28
Q

External non-sensorial retina?

A

Sits on brush membran
Contains much mithocondria
Wraps external part of photoreceptors
Stores vit a

29
Q

Sensorial retina?

A

1- photoreceptor neurons: cone & rode
2- transmitting neurons: bipolar & ganglion
3-related neurons: horizontal & amacrin
4- neuroglia : müller

30
Q

Layers of sensorial retina ?

A 
1- retina pigment epithel
2- rod & cone section
3- external limiting membran
4- external nuclear layer
5- external plexiform layer
6- internal nuclear layer
7- internal plexiform
8-ganglion cell layer
9- neural fibril layer
10-internal limiting membran
31
Q

Rod external section?

A

600-1000 disc
Discs contains rodopsin
High sensitivity for light

32
Q

Cone external section?

A

Contains iodopsin

Low sensitibility for light

33
Q

Rod internal segment?

A

A- elypsoid part : acidophylic , many mithocondria

B- myoid part: basophylic ,rapid protein synthesis , much glycogene less mithocondria

34
Q

Cone internal section

A

A- more mc then rod

B- myoid : same with rod

35
Q

External nuclear layer contains?

A

Rod & cone cell bodies and cores

36
Q

External plexiform layer contains ?

A

Synapses with horizontal and bipolars

37
Q

Internal nuclear layer contains?

A

Bipolar, horizontal, amacrin , müller

38
Q

Internal plexiform contains?

A

Bipolar - ganglion synapse

39
Q

where is Bipolar cells ?

A

Between inner and outer plexiform layer

40
Q

Where is ganglion cell?

A

Ganglion cell layer

41
Q

Horizontal cell ?

A

In inner nuclear layer

h1-rod h2cone

42
Q

Amacrin cells

A

No axon
Notched nucleus
In inner nuclear layer
Modifies bipolar cell impulses

43
Q

Neuroglial character cells?

A

1- müller
2- astrocyte
3- perivascular glia cell
4- retikulo endotelial microglial cell

44
Q

Eye lid faces ?

A

Inner: covered with palpebral conjunctiva
Contains cellula calciformis between epithel cells
(Restricts vaporizing)
Outer : multilayered cheratinised epithel

Neuro Histology (2 decks)

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