BIOLOGY - UNIT 8: HUMAN ANATOMY AND PHYSIOLOGY SENSORY SYSTEMS: THE EYE
Difficulty with seeing objects close to the eye is called:
1. Farsightedness 2. Hyperopia
Difficulty with seeing distant objects is called:
1. Nearsightedness 2. Myopia
Light refracted aspherically
Astigmatism
Localized distortion of light through the cornea is called ______ .
Astigmatism
The axons of the retinal culminate in the optic nerve which forms a __________ spot on the retina.
Blind
Trouble distinguishing colors
Color Blindness
The photoreceptor cells which are sensitive to colors are called the __________.
Cones
The area of the eye with a concentration of cones is the:
Fovea
Eyeball too short
Hyperopia
Eyeball too long
Myopia
Vitamin A deficiency
Night Blindness
The retinal cells responsible for night vision are:
Rods
Off-center viewing of a dim object at night is helpful because:
The faint object will focus off the fovea
A light image formed on the retina is inverted.
True
Night blindness can be caused by a deficiency of:
Vitamin A
