Vision Anatomy Flashcards
What three TUNICS make up the anatomy of the eye?
1) FIBROUS TUNIC
2) VASCULAR TUNIC
3) SENSORY TUNIC
What structures fall under the category of FIBROUS TUNIC?
The SCLERA and CORNEA
What structures fall under the category of VASCULAR TUNIC?
The CHOROID, CILIARY BODY, IRIS, CILIARY ZONULE (aka SUSPENSORY LIGAMENTS), and LENS
What structures fall under the category of SENSORY TUNIC?
The RETINA and MACULAR LUTEA FOVEA CENTRALIS (the notes were a little confusing here…)
What is the structure and function of the SCLERA?
S - White of the eye, DENSE AVASCULAR CT
F - Protects/shapes eye, anchors eye muscles
What is the structure and function of the CORNEA?
S - Transparent, DENSE AVASCULAR CT, well innervated (blinking, tearing), covered by STRATIFIED SQUAMOUS, lined by SIMPLE SQUAMOUS
F - Refracts light as it passes through
What is the structure and function of the CHOROID?
S - Many blood vessels, brown pigment
F - Nourishes SCLERA and RETINA, prevents scattering of light
What is the structure and function of the CILIARY BODY?
S - CILIARY MUSCLES (circular SMOOTH MUSCLE), CILIARY PROCESSES (with blood vessels)
F - Change LENS shape, secrete AQUEOUS HUMOR
What is the structure and function of the IRIS?
S - PUPILLARY CONSTRICTOR MUSCLES and PUPILLARY DILATOR MUSCLES (SMOOTH MUSCLES)
F - Changes PUPIL size to control amount of light entering the eye
What is the structure and function of the CILIARY ZONULE (aka SUSPENSORY LIGAMENTS)?
S - Fibers connecting CILIARY BODY to LENS
F - When taut, pull LENS flat. When relaxed, LENS is round
What is the structure and function of the LENS?
S - Transparent cells with crystallin protein, avascular
F - Changes shape to focus image on RETINA
What is the structure and function of the RETINA?
S - Outer pigmented layer, inner neural layer
F - Prevents light scattering, cells convert E into AP
What is the structure and function of the MACULAR LUTEA FOVEA CENTRALIS? (again, the notes confused me here… I don’t know if its one word or two different things…)
S - Mostly CONES, pinprick area with CONES only, BIPOLAR and GANGLION CELLS pulled away
F - Detailed color vision
