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29 Cards in this Set
- Front
- Back
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VITREOUS
components |
1. Collagen (Type 2)
2. Hyaluronic acid 3. Water (99%) [BCSC 12-7] |
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VITREOUS
attachments |
1. Vitreous base (firmest)
2. Retinal vessels 3. Optic nerve 4. Macula [BCSC 12-7] |
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VITREOUS
1. volume 2. percentage of eye |
1. 40 cc
2. 80% [BCSC 12-7] |
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MACULA
histological definition |
2 or more layers of ganglion cells
[BCSC 12-7] |
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Foveal avascular zone (FAZ)
size |
0.35 mm (350 microns)
~1/3 DD [BCSC 12-9] |
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MACULA
size |
5.5 mm (5500 microns)
~3.5 DD [BCSC 12-9] |
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RETINA
layers |
1. ILM
2. nerve fiber layer 3. ganglion cell layer 4. inner plexiform layer 5. inner nuclear layer 6. outer plexiform layer 7. outer nuclear layer 8. ELM 9. photoreceptor IS/OS [BCSC 12-9] |
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OUTER NUCLEAR LAYER
cell type |
Photoreceptors
[BCSC 12-9] |
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INNER NUCLEAR LAYER
cell types |
bipolar
amacrine horizontal Muller [BCSC 12-12] |
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ILM
component |
footplates of Muller cells
[BCSC 12-12] |
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What layers of retina are supplied by central retinal artery?
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INNER RETINA:
ILM NFL ganglion cell layer inner plexiform layer inner 2/3 of inner nuclear layer [BCSC 12-10] |
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What layers of retina are supplied by choriocapillaris?
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OUTER RETINA:
Outer 1/3 of inner nuclear layer Outer plexiform layer Outer nuclear layer Photoreceptors RPE [BCSC 12-10] |
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CHORIOCAPILLARIS
comes off of... |
Ciliary arteries:
- posterior choriocapillaris: long & short posterior ciliary arteries - anterior choriocapillaris: recurrent branches of anterior ciliary arteries [BCSC 12-12] |
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CENTRAL RETINAL ARTERY
comes off of... |
Ophthalmic artery
[BCSC 12-12] |
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RPE
embryologic origin |
Neuroectoderm
(Therefore, it is contiguous with pigment epithelium of ciliary body) [BCSC 12-12] |
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What comprises the outer retinal blood-ocular barrier?
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TIGHT JUNCTIONS between RPE cells
[BCSC 12-12] |
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RPE
functions (5) |
1. Absorbs light
2. Maintains subretinal space (i.e. pump) 3. Phagocytosis of outer segments 4. Vitamin A metabolism 5. Forms outer blood-ocular barrier [BCSC 12-12] |
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BRUCH'S MEMBRANE
layers |
1. Basement membrane of RPE
2. Inner collagenous zone 3. Middle elastic zone 4. Outer collagenous zone 5. Basement membrane of choriocapillaris [BCSC 12-15] |
|
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CHOROID
bloody supply |
SHORT & LONG POSTERIOR CILIARY ARTERIES
SHORT: optic nerve head, peripapillary choroid LONG: optic nerve to equator [CHERN 109] |
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CHOROID
1. thickest location (size) 2. thinnest location (size) |
1. Posterior pole (0.22 mm)
2. Ora serrata (0.1 mm) [BCSC 12-15] |
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CHOROID
blood drainage |
Vortex veins --> superior ophathalmic vein
[BCSC 12-15] |
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FOVEA
size |
1.5 mm
[BCSC 1-87] |
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FOVEOLA
location relative to optic nerve |
4 mm temporal
0.8 mm inferior BCSC [1-87] |
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FOVEOLA
photoreceptor type |
Cones
[BCSC 1-87] |
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ORA SERRATA
blood supply |
NONE
(watershed zone; therefore, peripheral retina degenerations are COMMON at ORA) [BCSC 1-88] |
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VITREOUS
collagen type |
Type II
[BCSC 1-89] |
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|
Cloquet's canal
definition |
- S-shaped canal in vitreous from posterior pole of the lens to the optic nerve head.
- Formed by regression of fetal hyaloidal vasculature. [BCSC 1-91] |
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ORA SERRATA
location relative to limbus |
6 mm nasally
7 mm temporally [CHERN 109] |
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POSTERIOR CILIARY ARTERIES
come off of... |
Ophthalmic artery
[BCSC 1-80] |
