What Power Contact Lens Should Be Used to Correct the Vision

question 20

Multiple Choice

What power contact lens should be used to correct the vision of a farsighted person whose near point is 80 cm to see something clearly at a distance of 25 cm?

• A) 2.8 diopters
• B) -2.8 diopters
• C) -4.0 diopters
• D) -4.2 diopters
• E) 4.2 diopters

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Definitions:

Unconditioned Stimulus

In classical conditioning, a stimulus that naturally and automatically triggers an unconditioned response without prior learning.

Discriminative Stimulus

A cue or signal in the environment that indicates that a specific behavior will result in a particular consequence.

Unconditioned Stimulus

A stimulus that naturally and automatically triggers a response without any need for learning.

Primary Reinforcer

An innately reinforcing stimulus, such as one that satisfies a biological need.