Glossary I

Ipsilateral eye refers to the eye on the same side of the head as the structure to which the eye sends inputs.
IQ is the abbreviation for Intelligence Quotient which is an attempt to measure the intelligence of a person. The IQ score is usually based upon the results of a written test . To calculate the IQ, the person's mental age (as determined by a test) is divided by their chronologic age and the result is multiplied by 100.
Iris the circular muscle that controls the amount of light entering the eye.

Iron law of oligarchy refers to Robert Michels’s principle of political and social control which predicts that in any group where power is concentrated in the hands of a few individuals (an oligarchy), these individuals will tend to act in ways that protect and enhance their power.
Irony refers to statements in which the intended meaning is opposite of the stated meaning
Irrational belief is defined as unreasonable views or convictions that produce emotional and behavioral problems.

Irrational Fear refers to apprehension before a threat which is non existent in reality.

Irrational love refers to a kind of love that exists in abusive relationships, one-sided relationships, or when a person has a strong physical, mental, or emotional attachment to an inanimate object.