External Eye Anatomy
What are the four rectus muscles found in the eye?
Superior rectus muscle
Inferior rectus muscle
Medial rectus muscle
Lateral rectus muscle
Name two parts of the vascular tunic
ex. Choroid layer, pupil, iris, ciliary body, ciliary muscle, ciliary process
What is the common word for myopia?
Nearsightedness
What does the tendon of the superior oblique aid in terms of movement?
Eye intorsion, depression and abduction
What part of the inner eye receives light that the lens has focused and converts the light into neural signals?
The retina
Frankie has never had glasses, is told she has perfect vision, and has never had any visual defects. The term associated to perfect vision is ...
Emmetropia
What are the two layers of the fibrous layer of the eye? What is their function?
Sclera and cornea; focuses entry of light into eye
What is the difference between the vitreous and aqueous humor?
The vitreous humor is located behind the lens and bends light and provides structure, while the aqueous humor is located in front of the lens and supplies the cornea with nutrients.
Hyperopia is also known as ...
Farsightedness
What is the function of the optic nerve?
To transfer visual information from the retina to the vision centers of the brain via electrical impulses
Do human eyes contain a tapetum lucidum?
No
When does presbyopia typically occur?
In middle or old age
What is the function of the levator palpebrae muscle?
Retracts the eyelid, exposing the cornea to the outside, giving vision; in simpler terms, it moves the eyelid above the eye to allow for vision to occur
What happens to the lens when it changes shape?
Changes the focal distance of the eye to focus the light rays that pass through it in order to create clear images of objects that are positioned at various distances
James goes to the doctors' office with complaints of blurred vision at all distances. The doctor says the cause fo his blurred vision is an imperfection in the curvature of the eye. What is the medical diagnosis that the doctor would give James?
Astigmatism