Vision

How fast Does an average blink last ?

• 3/4 of a second
• 1/10 of a second
• 1/2 of a  second
• 1/7 of a second

Which is True?

• There are an equal number of rods and cones.  Cones detect black and white
• there are an equal number of rods and cones.  Rods detect Black and White
• there are more cones than rods and cones detect black and white
•  There are more rods than cones and rods detect black and white

What is letter B

• Optic nerve
• Lens
• Cornea
• Retina

What is letter E?

• Vitreous humor
• Retina
• Cornea
• Optic nerve

What is letter F?

• Retina
• Pupil
• Vitreous humor
• Iris

What is letter G?

• Sclera
• Retina
• Lens
• Vitreous humor

What is letter I?

• Cornea
• Lens
• Vitreous humor
• Optic nerve

What is letter H?

• Cornea
• Optic nerve
• Iris
• Retina

True

• Cone cells detect light and dark
• Rods focus light
• Cones detect color
• Rods detect color

The retina is 

• rectangular
• the clear tissue that covers the front of the eye
• the light sensitive inner surface of the eye containing the receptor rods and cones plus layers of neurons that begin the processing of visual information
• changes shape to help focus images on the retina