The Eye Flashcards
What are the cells of the Retina?
- Pigmented Epithelium cells
- Bipolar Cells
- Horizontal Cells
- Amacrine Cells
- Mueller Cells
- Ganlgion Cells.
Pigmented Epithelium Cells
-form melanin
-protect rods/cones.
-form blood-retina barrier
esterify Vitamin A
Bipolar Cells
Neuron synapse with rod/cone
Horizontal Cells
Interneurons connect rods/cones with bipolar cells.
-process lateral vision.
Amacrine Cells
interneuron to connect ganglion to bipolar neurons
Mueller Cells
Neuroglial cells throughout retina
-forme external and internal limiting membrane
Ganglion Cells
neurons that form optic tract
What are the different Regions of the Retina?
- Maculae Lutea
- Fovea Centralis
- Optic Disk
Maculae Lutea
Highest vision acuity as it contains the fovea centralis
Fovea Centralis
Contained in teh Maculae Lutea.
-high cone density, and no light diffraction
Rods
Contain rhodopsin for contrast detection.
100 of synapses onto 1 axon. Low level of acuity
Cones
contain 3 iodopsins
High visual actuity as one synapse with 1 axon
What components form the Lens?
- Capsule
- anterior epithelium
- nucleus
Capsule
suspensory ligament insertion
Anterior Epithelium
part of lens. simple cuboidal
Nucleus
lens cell that mature into fiber-like material. No nucleus or organelles.
Anterior surface of teh eyelid…
contain gland of Zeiss: sebaceous gland. CLogged forms a stiea
-Glands of Moll: sweat glands
Palpebral fascia
core of eyelid
Palpebral Conjunctiva
stratified columnar epithelium with goblet cells.
Lines inner eyelid surface.
Canal of Schlemm
Canal allowing passage of aqueous humor from posterior to anterio chamber, via the iris.
What components form the Vascular tunic?
Iris
- ciliary body
- Choroid
What forms the Fibrous tunic?
- Sclera
- Cornea
- episcleral layer
- sclera proper
Inner Tunic
-Retina divided into the photosensitive region and non-photosensitive region by the division of the oro serrata
