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CatoptricalAngle of reflectionConicsCaustic curveVirtual imageOrthopticTransflectionReal imageVergencePerspectivityRotoreflectionOptical axisFocal planeCausticFocal depthVertexPolyhedronFocusStigmatismBisectrixConformal opticsCircumconicsSphericsCatacausticCornerMetamathematicsAplanatIsopticConjugate mirrorCoxeter-dynkin diagramOblique reflectionIntersectionCyclotomicsPhirotopeConeAngle of incidenceProjectorConicPath tracingOctopoleTopologyAnalytic geometryIndicatrixProspectivityBest form lensAlgebraic topologyZeteticsTruncationOtopyMultiplying lensTriangle groupProjective geometryTractricoidField theoryProjectionDuoprismFresnel's rhombRing theoryGeometricsLambert's cosine lawDirectrixCatenoidBranch cutChirotopePrismoidCaterpillarLongitudinal aberrationConic sectionCappingAxial pointKnot theoryRay castingProtographPretopologyVergencyHomologyApertureSemilensDifferential topologyAutotopismTractoryCracovianCategory theoryTrisectorSymptosisToposPrismPenrose triangleCentre of curvatureQuaternionicsReal analysisRectificationTruncusMirror symmetrySemiparabolaMetrizationComplex analysisFocal lengthPoint of contactTop-hat transform