Cone or cone-rod dystrophies encompasses a group of progressive inherited retinal dystrophies characterised by predominant impairment of cone-mediated vision. This may be accompanied by rod dysfunction. It can be an isolated phenotype or associated with systemic features (Alstrom syndrome and Bardet-Biedl syndrome).

Cone dystrophy and cone-rod dystrophy describe a group of inherited retinal disease that primarily affects of the normal cone photoreceptors of the retina. This results in reduced central vision and difficulty in recognising colours.