Bony orbit
This structure is the bony cavity that houses and protects the eye.
What is the bony orbit?
This cranial nerve is responsible for vision.
What is the optic nerve?
This muscle, controlled by cranial nerve III, only moves the eyes to look up.
What is the superior rectus?
This is normal color vision, where a person can see all three primary colors.
What is trichromacy?
This colored part of the eye controls how much light enters.
What is the iris?
The bony orbit is formed by this many different bones.
What are seven bones?
This cranial nerve controls most of the eye's voluntary movements.
What is the oculomotor nerve?
This muscle, controlled by cranial nerve VI, allows the eyes to abduct.
What is the lateral rectus?
A type of color blindness where a person sees only shades of gray.
What is monochromacy?
This fluid is secreted from the lacrimal gland, and provides protection and lubrication for the eye.
What are tears?
This bone is shaped like a butterfly.
What is the sphenoid bone?
This cranial nerve innervates the superior oblique muscle of the eye.
What is the trochlear nerve?
This muscle, controlled by cranial nerve IV, moves the eye down and out.
What is the superior oblique?
A type of color blindness where one of the three cone pigments is missing, leaving a person with only two types of cones.
What is dichromacy?
This biconvex structure adds “plus power” to the eye and changes shape during accommodation, with a central nucleus, surrounding cortex, and a capsule.
What is the crystalline lens?
This small bone houses the lacrimal sac.
What is the lacrimal bone?
This cranial nerve innervates the lateral rectus muscle, allowing the eye to abduct.
What is the abducens nerve?
This muscle, controlled by cranial nerve III, moves the eye downward.
What is the inferior rectus?
This type of red-green color blindness results from missing or non-functioning red cones.
What is protanopia?
This nervous system division controls pupil dilation.
What is the sympathetic nervous system?
This bone seperates the nasal cavity from the brain, allows passage of olfactory nerves, and contributes to the medial wall of the orbit.
What is the ethmoid bone?
This cranial nerve provides sensory innervation to the cornea, forehead, and upper eyelid and has three major divisions: ophthalmic, maxillary, and mandibular.
What is the trigeminal nerve?
This muscle, controlled by cranial nerve III, moves the eye up and out.
What is the inferior oblique?
A mild blue-yellow color vision defect where blue cone sensitivity is altered.
What is tritanomaly?
The superior and inferior ophthalmic veins both drain into this venous sinus inside the skull.
What is the cavernous sinus?