| Nance-Horan Syndrome | cataract-dental syndrome, mesiodens-cataract syndrome, X-linked cataract with Hutchinson teeth | NHS | X-linked dominant, X-linked recessive | 
          
                  | Nanophthalmos 1 | NNO1 | 11p locus | autosomal dominant | 
          
                  | Nanophthalmos 2 | NNO2 | MFRP | autosomal dominant, autosomal recessive | 
          
                  | Nanophthalmos 3 | nanophthalmia 3, NNO3 | 2q11-q14 locus | autosomal dominant | 
          
                  | Nanophthalmos AD | NNOAD | TMEM98 | autosomal dominant | 
          
                  | Nanophthalmos Plus Syndrome |  | MFRP | autosomal recessive | 
          
                  | Nanophthalmos with Retinitis Pigmentosa |  | CRB1 | autosomal recessive | 
          
                  | Nanophthalmos with Retinopathy |  | ? | autosomal recessive | 
          
                  | Nemaline Myopathy 10 | NEM10 | LMOD3 | autosomal recessive | 
          
                  | Neu-Laxova Syndrome 1 | NLS, NLS1 | PHGDH | autosomal recessive | 
          
                  | Neu-Laxova Syndrome 2 | NLS, NLS2 | PSAT1 | autosomal recessive | 
          
                  | Neuhauser Syndrome | megalocornea-mental retardation syndrome, MMR syndrome | ? | autosomal recessive | 
          
                  | Neuraminidase Deficiency | ML 1, mucolipidosis I, myoclonus-cherry red spot syndrome, NEU1 deficiency, sialidosis type I, sialidosis type II | NEU1 | autosomal recessive | 
          
                  | Neurodegeneration with Ataxia, Dystonia, and Gaze Palsy, Childhood-Onset | NADGP | SQSTM1 | autosomal recessive | 
          
                  | Neurodegeneration with Brain Iron Accumulation | Hallervorden-Spatz disease, INAD, INAD1, infantile neuroaxonal dystrophy, Karak syndrome, NBIA2A, NBIA2B, NBIA3, Seitelberger disease | FTL, PLA2G6 | autosomal recessive | 
          
                  | Neurodevelopmental Disorder With or Without Seizures and Gait Abnormalities | NEDSGA | GRIA4 | autosomal dominant | 
          
                  | Neurodevelopmental Disorder with Progressive Microcephaly, Spasticity, and Brain Anomalies | NDMSBA | PLAA | autosomal recessive | 
          
                  | Neurodevelopmental Disorder, Mitochondrial, with Abnormal Movements and Lactic Acidosis | NEMMLAS | WARS2 | autosomal recessive | 
          
                  | Neurofibromatosis Type I | peripheral neurofibromatosis, von Recklinghausen disease | NF1 | autosomal dominant | 
          
                  | Neurofibromatosis Type II | ACN, acoustic neurinoma, acoustic schwannoma, central neurofibromatosis | NF2 | autosomal dominant | 
          
                  | Neuronal Ceroid Lipofuscinoses | Batten disease, NCL, neuronal ceroid lipofuscinosis, Vogt-Spielmeyer disease | ATP13A2, CLN2, CLN3, CLN4, CLN5, CLN6, CLN7, CLN8, CLN9, CTSD, MFSD8, PPT1, TPP1 | autosomal dominant, autosomal recessive | 
          
                  | Neuropathy, Ataxia, and Retinitis Pigmentosa | NARP syndrome | MTATP6 | mitochondrial | 
          
                  | Niemann-Pick Disease, Type C2 | NPC2 | NPC2 | autosomal recessive | 
          
                  | Niemann-Pick Disease, Types A and B | sphingomyelin lipodosis, sphingomyelinase deficiency | SMPD1 | autosomal recessive | 
          
                  | Niemann-Pick Disease, Types C1 (D) | Niemann-Pick disease chronic neuronopathic form, Niemann-Pick disease Nova Scotian type, Niemann-Pick disease with cholesterol esterification block, NPC | NPC1 | autosomal recessive | 
          
                  | Night Blindness, Congenital Stationary, CSNB1A | CSNB1A, NBM1, night blindness with myopia, X-linked CSNB | NYX | X-linked recessive | 
          
                  | Night Blindness, Congenital Stationary, CSNB1B | CSNB, CSNB1B, type 1B night blindness | GRM6 | autosomal recessive | 
          
                  | Night Blindness, Congenital Stationary, CSNB1C | CSNB, CSNB1C, type 1C night blindness with myopia | TRPM1 | autosomal recessive | 
          
                  | Night Blindness, Congenital Stationary, CSNB1E | CSNB1E | GPR179 | autosomal recessive | 
          
                  | Night Blindness, Congenital Stationary, CSNB1H | CSNB1H | GNB3 | autosomal recessive | 
          
                  | Night Blindness, Congenital Stationary, CSNB2A | CSNB2, CSNB2A, type 2A night blindness with myopia, X-linked CSNB | CACNA1F | X-linked recessive | 
          
                  | Night Blindness, Congenital Stationary, CSNB2B | CSNB, CSNB2B, type 2B night blindness with myopia | CABP4 | autosomal recessive | 
          
                  | Night Blindness, Congenital Stationary, CSNBAD1 | CSNB, CSNBAD1, type AD1 night blindness | RHO | autosomal dominant | 
          
                  | Night Blindness, Congenital Stationary, CSNBAD2 | CSNB, CSNBAD2, Rambusch type congenital stationary night blindness, type AD2 night blindness | PDE6B | autosomal dominant | 
          
                  | Night Blindness, Congenital Stationary, CSNBAD3 | CSNB, CSNB1G, CSNBAD3, Nougaret type congenital stationary night blindness, type AD3 night blindness | GNAT1 | autosomal dominant | 
          
                  | Noonan Syndrome | female pseudo-Turner syndrome, male Turner syndrome, NS1, NS2, NS3, NS4, NS5, NS6, NS7 | BRAF, KRAS, LZTR1, MEK1, NRAS, PTPN11, RAF1, SOS1 | autosomal dominant, autosomal recessive | 
          
                  | Norrie Disease | atrophia bulborum hereditaria, Episkopi blindness, ND | NDP | X-linked recessive | 
          
                  | Nystagmus 1, Congenital, X-linked | congenital motor nystagmus 1, idiopathic infantile nystagmus, infantile nystagmus, NYS1, nystagmus 1 | FRMD7 | X-linked recessive | 
          
                  | Nystagmus 2, Congenital, AD | NYS2, nystagmus congenital motor 2 | ? | autosomal dominant | 
          
                  | Nystagmus 3, Congenital, AD | NYS3 | ? | autosomal dominant | 
          
                  | Nystagmus 4, AD | NYS4, vestibulocerebellar disorder with ocular signs | ? | autosomal dominant? | 
          
                  | Nystagmus 5, Congenital, X-linked | NYS5 | ? | X-linked dominant | 
          
                  | Nystagmus 6, Congenital, X-linked | NYS6 | GPR143 | X-linked recessive | 
          
                  | Nystagmus 7, Congenital, AD | NYS7 | ? | autosomal dominant | 
          
                  | Nystagmus-Split Hand Syndrome | congenital central limb ray deficiency, Karsch-Neugebauer syndrome, KNS, split-hand with congenital nystagmus fundal changes and cataracts | ? | autosomal dominant |