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Histology 2 > Eye Histology > Flashcards

Eye Histology Flashcards

1
Q

Fiborus layer of the eye components

A

Sclera
Cornea

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2
Q

Vascular layer (uvea) of the eye components

A

Chorid
Ciliary Body
Iris

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3
Q

Sensory layer of the eye components

A

Retina

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4
Q

Collagen+ dense connective tissue (fibroblasts, elastic fibers)
Extends from cornea to the optic nerve
What tissue is this?

A

Sclera

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5
Q

Function: supports eye shape, protects against trauma, surface for attachment of extraocular muscles, protects the more delicate internal structures

A

Sclera function

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6
Q

Most transparent tissue of the body
External surface layer- stratified squamous epithelium
1mm thick multilayered collagen fibers in the middle
Inner surface layer- endothelium

A

Cornea

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7
Q

The basement membrane of the cornea (stratified squamous epithelium) is called the what?

A

Bowman’s Membrane

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8
Q

Uneven cornea is one of the causes for _______

A

Astigmatism

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9
Q

specialized basement membrane
Nonkeratinized
Sensory –free nerve endings present
Membrane maintains shape of the cornea- protects the stroma underneath from infections

A

Bowman’s membrane

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10
Q

Endothelium of the cornea has Na+/K+ ATPase pumps present
It’s basement membrane is called the _________

A

Descemet’s membrane

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11
Q

Highly vascularized connective tissue (fibroblasts)
present in the posterior 2/3rd of the eye ball
Numerous melanocytes- make the black layer
prevent light from entering the eye ball from the sides and helps in limiting the light entry to the pupil only

A

Choroid

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12
Q

supplies retina with essential nutrients & O2

A

Choroidocapillary lamina (CCL)

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13
Q

Rests on the sclera
Surrounds the lens
Where the choroid meets the Cornea

A

Ciliary body

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14
Q

Makes up most of the ciliary body and consists of smooth muscle fibers
Contraction of these muscles affects the shape of the lens and is important in visual accommodation

A

Ciliary Muscle

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15
Q

Finger-like processes covered by a dual layered cuboidal epithelium
Superficial cells are not pigmented, inner layer is highly pigmented
Core is made of connective tissue
Epithelial function: Secretion of aqueous humor, to take fluids from the blood and transfer them on the other side as aqueous humor due to close proximity to vessels

A

ciliary processes

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16
Q

What are the 3 steps in the production and removal of the aqueous humor?

A
  1. Aqueous humor is secreted by ciliary process into the posterior chamber
  2. AH moves from the posterior chamber, through the pupil, to the anterior chamber
  3. Excess AH is resorbed via the scleral venous sinus
17
Q

Originate from the ciliary processes and attach to the lens capsule
Made up of Fibrillin
Hold the lens in place

A

Ciliary Zonule

18
Q

Thin tissue rising from the ciliary body
Leaves an opening in the middle called the pupil
Controls the diameter of the pupil
Stroma is made of loose connective tissue
Epithelial cells that are in contact with the _____ contain melanin forming a pigmented epithelium

A

Lens

19
Q

Muscles that control the pupil diameter have ____________ and ___________ innervation

A

sympathetic; parasympathetic

20
Q

myoepithelial cells in the iris are?

A

Dilator pupillae muscle (DPM)

21
Q

smooth muscles of the iris are?

A

Sphincter pupillae muscle (SPM)-

22
Q

Pigmented layer- simple cuboidal cell layer- provides Vit. A
Neural layer- highly stratified- organized in 3 cellular layers
histologically and embryologically it is a part of the CNS

A

Retina

23
Q

Neural layer of the retina can be divided into 3 cellular layers. The 3 cellular layers are:

A

Ganglion cell layer
inner nuclear layer
layer of rods and cones

24
Q

Receptive in bright light, give a perception of color

A

Cones

25
Q

Receptive even in very in dim light

A

Rods

26
Q

glial cells of the neural layer of retina

A

Mϋller cells

27
Q

Between pigment epithelium and layers of rods and cones. Separation of the 2 layers may occur resulting in ________

A

retinal detachment

28
Q

provides a surface for the ciliary zonules to attach

A

Lens capsule

29
Q

Highly elastic, avascular tissue

A

Lens

30
Q

Lens loses its elasticity- results in __________- farsightedness- cant see closer objects clearly

A

presbyopia

31
Q

The inner layer of the eyelid is called the

A

conjunctiva

Histology 2 (3 decks)

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