Copy of 3 The Eye Flashcards
(30 cards)
What problems with vision did Molly exhibit as a baby?
Molly focused her gaze on lights, rubbed and pressed on her eyes frequently.
What tests did the doctor administer to assess Molly’s vision?
Molly was given a battery of vision tests, including the Snellen Eye chart.
Why might the Snellen Eye chart test be difficult for infants?
Infants may not respond to light, have slow pupil response, cannot follow a target, and may bump into obstacles.
What was Molly diagnosed with?
Molly was diagnosed with Leber Congenital Amaurosis (LCA).
What genetic condition caused Molly’s LCA?
Molly inherited two defective copies of the RPE65 gene from her parents.
What is the function of the eyelid?
The eyelid covers and protects the eye.
What is trichiasis?
Trichiasis is the inversion of the eyelashes, which can irritate the eye.
What is conjunctivitis commonly known as?
Conjunctivitis is commonly known as pink eye.
What do lacrimal glands produce?
Lacrimal glands produce tears.
What is the function of tears?
Tears moisten and lubricate the eye surface and contain enzymes that kill bacteria.
What is the cornea?
The cornea is a transparent dome that focuses light.
What is keratoconus?
Keratoconus is a condition where the cornea thins, causing a cone-like bulge.
What is the sclera?
The sclera is the white part of the eye and a continuation of the cornea.
What is the optic nerve responsible for?
The optic nerve transmits information from the eye to the occipital lobe of the brain.
What is the choroid?
The choroid contains blood vessels and is part of the middle tunic of the eye.
What is the function of the iris?
The iris is the colored portion of the eye that controls the size of the pupil.
What is the fovea centralis?
The fovea centralis is the region of the sharpest vision.
What is the blind spot?
The blind spot is the region where the optic nerve and blood vessels exit the eye, lacking photoreceptors.
What are rods and cones?
Rods are responsible for monochromatic vision, while cones are responsible for color vision.
What is accommodation in the eye?
Accommodation is the process where the lens changes shape to focus on objects.
What are cataracts?
Cataracts are the clouding of the lens, leading to vision impairment.
What is aniridia?
Aniridia is a condition where a person is born without an iris.
What is color blindness?
Color blindness is a genetic trait that affects boys more than girls, located on the X chromosome.
What are floaters?
Floaters occur when the vitreous substance clumps and casts shadows on the retina.
