Eye Anatomy/Physiology

What is the nervous layer of the eye?

What are the axons of ganglion cells that exit the posterior eye known as?

What is true about the photoreceptor Rods?

• Most important for black and white vision in dim light

• Highest contrast in peripheral eye

• Allow for color vision and sharpness of vision in bright light

• 3 different types: red, blue, and green

• Highest concentration in fovea centralis

What is true about the photoreceptor Cones?

• Most important for black and white vision in dim light

• Highest contrast in peripheral eye

• Allow for color vision and sharpness of vision in bright light

• 3 different types: red, blue, and green

• Highest concentration in fovea centralis

What causes color blindness?

• Absence or deficiency of one of the three cones

• Trauma to eye at birth

• Brain tumor affecting astrocytes

Tags

NGSS.HS-LS3-2

patch of cells in the exact center of the posterior retina?

Tags

NGSS.HS-LS1-2

a dense concentration of cones in the macula?

Highly vascular; pigmented; contains melanin produced by melanocytes

Attached to lense; allows for adaptation to near vision

colored portion of the eye