Vision
Sensory receptor for sight.
What are photoreceptors?
Skin flaps that protect the eye?
What are palpebrae (eyelids)?
The 3 layers of the eye.
What are fibrous layer, vascular layer (uvea), and nervous layer (retina)?
Area where the optic nerve and blood vessels pass through eye wall.
What is the optic disc?
Opacity of the lens that obscures vision.
What is a cataract?
This structure accounts for most refraction occuring in the eye.
What is the cornea?
Also known as third eyelid.
What is the nictitating membrane?
"White" of the eye and transparent portion of eye.
What are the sclera and cornea?
The two layers of the retina.
What are the pigmented layer and the neural layer?
What is the aqueous compartment and vitreous compartment?
Focusing light rays on the retina by changing the shape of the lens.
What is accommodation?
Glands that secrete an oily substance that prevent eyelids sticking together and tears from spilling out of the eye.
Opening in iris where light enters eye.
What is the pupil?
What are the photoreceptor layer, bipolar cell layer, and ganglion cell layer?
The junction of the cornea and sclera.
What is the limbus?
Vitamin A derivative that absorbs light.
What is retinal?
The protective mucous membrane on surface of eye and inner eyelids.
What is conjunctiva?
Highly vascular layer that provides nutrients to retina.
What is the choroid?
Depression in central retina with high concentration of photoreceptors.
What is the central fovea?
Eye disease characterized by increased intraocular pressure.
Protein molecules attached to retinal that promote absorption of different wavelengths of light.
What are opsins?
Apparatus that moistens and protects eye.
What is the lacrimal apparatus?
Reflective region in some species that aids vision in low light conditions.
What is the tapetum lucidum?
Transparent, avascular structure that changes shape to aid in focusing light.
What is the lens?
Jelly-like substance that holds the retina in place.
What is vitreous humor?