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A contracting pattern of retinal image leads to the perception of an object that is:
AIDS
Acquired Immune Deficiency Syndrome, a life-threatening condition caused by the human immunodeficiency virus (HIV), leading to a severe weakening of the immune system.
Criteria
Standards, rules, or tests by which something can be judged or decided, used to make evaluations or decisions.
HIV Spread
The transmission of the Human Immunodeficiency Virus, which can occur through unprotected sex, sharing needles, or from mother to child during birth or breastfeeding.
Research
The systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions.
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