Vision Flashcards
Cornea
Gives your eye shape; outer lens makes it sharp
Pupil
Lets light in, it dilates to let more or less light in
Iris
Color part of the eye; a muscle, opened and close the pupil
Lens
Add distance and dimension
Retina
Thin film in the back of the eye where transduction occurs
Transduction
Light messages turn into neural messages
Photoreceptors
Nerve cells in the retina that transduce images
What are the two types of photoreceptors?
Rods and cones
Rods
Tells us light and darkness
Cones
Tells us color; acknowledges three colors
What three colors do cones acknowledge?
Red, blue, and green
Information is sent from the retina to the ..?
Optic nerve
Optic nerve
Thickest nerve in the body. Sends images to thamals
Blind spots
Part of the eye where the optic nerve covers the retina. We don’t see anything.
Why don’t we notice the blind spots?
The brain and eye fill the spot
Fovea is the part of retina that is the …?
Sharpest.
Fovea located
Center of your field vision
The more we moved to the edges (peripheral) of your visual field the … things gets.
Blurrier
Visual Acuity
Measurement to see how sharp your eye is
The average person see what vision?
20/20
People can see 20 ft away
You see 20ft away
How does color blindness occur?
When there is an issue with the cones
What is the most common color blindness?
Red- see pink and grey
What is also a common blindness too?
Green- see brown
What is the key to vision?
Light waves
How are light waves measured?
In amplitude
Bigger wave = …?
Brighter light
