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Perger prism. A Perger prism or Perger–Porro prism system is a prism, that is used to invert (rotate by 180°) an image. The special feature of this prism is that, like a traditional double Porro prism system, it manages this with only four beam deflections and has neither a roof edge with the accompanying phase correction problems, a ...
The PRISMA flow diagram, depicting the flow of information through the different phases of a systematic review. PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) is an evidence-based minimum set of items aimed at helping scientific authors to report a wide array of systematic reviews and meta-analyses, primarily used to assess the benefits and harms of a health care ...
The Nebraska Diagnostic and Evaluation Center ( D&E) is a maximum custody, reception, diagnostic, evaluation, assessment, classification and assignment facility for the Nebraska Department of Correctional Services ( NDCS ). Located in Lincoln, Nebraska, D&E was established by the Nebraska State Legislature in 1976 as part of Legislative Bill ...
Ophthalmology. In ophthalmology, horror fusionis is a condition in which the eyes have an unsteady deviation, with the extraocular muscles performing spasm-like movements that continuously shift the eyes away from the position in which they would be directed to the same point in space, giving rise to diplopia. Even when the double vision images ...
A double Porro prism system reflects light four times. Porro prisms are most often used in pairs, forming a double Porro prism. A second prism rotated 90° with respect to the first, is placed such that light will traverse both prisms. The net effect of the prism system is a beam parallel to but displaced from its original direction, with the ...
The Arkansas Department of Corrections ( DOC ), formerly the Arkansas Department of Correction, is the state law enforcement agency that oversees inmates and operates state prisons within the U.S. state of Arkansas. DOC consists of two divisions, the Arkansas Division of Corrections (ADC) and the Arkansas Division of Community Corrections (DCC ...
Oregon DOC Website. The Oregon Department of Corrections is the agency of the U.S. state of Oregon charged with managing a system of 12 state prisons since its creation by the state legislature in 1987. In addition to having custody of offenders sentenced to prison for more than 12 months, the agency provides program evaluation, oversight and ...
Prism (optics) An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled — elements with two parallel surfaces are not prisms. The most familiar type of optical prism is the triangular prism, which has a triangular base and rectangular sides.