Exam 19: Sensation and Perception: Vision

Kateria stares at an image of the U.S.flag with the stars black,the field around the stars yellow,and the stripes black and green.She then stares at a white sheet of paper.The afterimage of a red,white,and blue flag is explained by which theory of color vision?

If you wanted to move quickly into the dark without having to adapt,you would use what color light bulb in the room?

The shortest wavelengths of visible light are sensed as red,while the longest wavelengths of light are sensed as purple.

Muscles attached to which of part of the eye alter its shape and change the eye's focal point?

Brenda has no difficulty reading a book in front of her but is unable to read street signs from a distance.She probably has

Like high-resolution digital sensors that are made of many small pixels,the tightly packed cones in which part of the eye produce the sharpest images?

How many minutes of complete darkness does it take to reach maximum visual sensitivity?

Visual problems such as nearsightedness,farsightedness,and astigmatism are the result of

Visual acuity is sharpest when images are focused on the fovea because there is a high concentration of which of the following in this region?

When your eyes reach the point of complete dark adaptation and maximum visual sensitivity,they will be how many more times as sensitive to light?

If your eyeball is too long,the resulting condition is called

The visual receptors for color and bright light are the rods,while the cones are the visual receptors for dim light and produce only black and white sensations.

The area of the retina is about the size and thickness of a postage stamp.

The theory of color vision that is based on the three cone types of red,green,and blue is the _____ theory.

Visible light starts at the "short" wavelengths,which we sense as

Hyperopia is the condition of the eyes in which the person cannot

The visual receptors that are used under dim light and produce only black and white sensations are the

The cones of the retina

Larry is taking a vision test in which he is asked to detect numbers and designs within circles containing large numbers of dots of varying colors.However,all Larry sees is a jumble of dots.Larry is most likely taking which test?

Regarding the incidence of red-green color weakness,what percent of Caucasian females have this weakness?