Cluster HeadacheHeadache DisordersTrigeminal Autonomic CephalalgiasHeadacheMigraine DisordersSUNCT SyndromeSyndromeTension-Type HeadacheVision, OcularVascular HeadachesVision, LowVision DisordersHeadache Disorders, SecondaryVision TestsColor Vision DefectsVision, BinocularDown SyndromeMetabolic Syndrome XOcular HypertensionEyeVisual AcuityVision, MonocularToxoplasmosis, OcularBlindnessNight VisionSjogren's SyndromeNephrotic SyndromeRefraction, OcularDominance, OcularMigraine without AuraOcular Motility DisordersAlbinism, OcularOcular Physiological PhenomenaColor Perception TestsEye InjuriesAbnormalities, MultipleEye NeoplasmsTurner SyndromeColor PerceptionCorneaRefractive ErrorsTonometry, OcularTreatment OutcomeContrast SensitivityHorner SyndromeVisual FieldsSpinal PunctureMyelodysplastic SyndromesRetinaIntraocular PressurePrevalenceEye AbnormalitiesTearsCushing SyndromeVisually Impaired PersonsMigraine with AuraEyeglassesDry Eye SyndromesMagnetic Resonance ImagingAcute Coronary SyndromePolycystic Ovary SyndromeStrabismusOphthalmic SolutionsRetrospective StudiesTuberculosis, OcularWilliams SyndromeBlood Patch, EpiduralConjunctival DiseasesTime FactorsCorneal DiseasesCataractUveitisVisual PerceptionDiGeorge SyndromePhotic StimulationNeurologyGlaucomaEye Infections, ParasiticPhotophobiaAmblyopiaRetinal DiseasesProspective StudiesEye DiseasesFollow-Up StudiesFixation, OcularPrader-Willi SyndromeVitreous BodyLong QT SyndromeRisk FactorsPedigreeMyopiaAnalgesicsVision DisparityQuestionnairesTryptaminesSensory ThresholdsSensory DeprivationGuillain-Barre SyndromeRetinal Cone Photoreceptor CellsTomography, X-Ray Computed