Flashcards in Unit C: 4.0 Deck (25):
What is the function of the cornea?
Protect all the sensitive parts of the eye
What is the function of the iris?
To control the size of the pupil
What is the function of the pupil?
To let in more or less light
What is the function of the ciliary muscle?
To make the lens thicker or thinner
What is the function of the lens?
To focus the light onto the retina
What is the purpose of the retina?
To send the image to the optic nerve
What is the function of the optic nerve?
To send the image to the brain
What does it mean when the pupil dilates?
Which part of the camera is like the retina?
What part of the camera is like the iris?
What part of the camera is like the eyelid?
What part of the camera is like the lens?
What part of the camera is like the pupil?
What is the retina?
It is the sensitive layer that like strikes. It is filled with photo receptors
What are rods sensitive to?
What are cones sensitive to?
Why can't you see colors in the dark?
Because comes don't work very well in low light
What happen when light strikes the retina?
The photoreceptors send light to the optic nerve
What is farsightedness?
When the light doesn't focus early enough
What is nearsightedness?
When the light focuses to early
How is farsightedness corrected?
It is fixed with convex lenses
How is nearsightedness corrected?
It is fixed with concave lenses
How does laser eye surgery work?
The surgeon uses a laser to reshape the cornea
How do night vision goggles work?
Light goes through light intensifiers and then through a phosphor screen which causes them to glow green