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The term schizophrenia was coined by Eugene Bleuler. Symptoms of schizophrenia are arranged into groups or clusters called as domains. The domains of dysfunctions are positive symptoms, negative symptoms, cognitive impairments, mood and suicidity, and aggression. Cognition is the sum total of mental processes that makes us acquire knowledge and keeps us aware of our surroundings and thus enables us to arrive at appropriate judgments. Cognitive deficits are recognized as enduring and persistent features in schizophrenia and can be neuro-cognitive or relating to social cognition. Neurocognitive deficits are deficits in speed of processing, attention / vigilance, working memory, verbal memory, visual memory, reasoning and problem solving, social cognition. Cognitive function can be assessed by various methods like experimental approach, neuropsychological and psychometric and ecologic approach. Cognitive deficits are present at onset of illness producing substantial impairment. Unlike psychotic symptoms, which remit with treatment, functional impairments remain stable over time. Detail understanding of such symptoms will help in disability limitation. Various cognitive remediation programmes are underway with such intent. Articles till March, 2012 were searched through PubMed and Google Scholar, which were studied in an attempt of understanding the topic. The information was structured and organized.