Study on the Effects of Mutations Under Inherited Retinal Disease in Korean

Inclusion Criteria: * Inherited retinal disease * Age between 4 months and 75 years * Subject who has clinically confirmed visual impairment including night blindness or photophobia. Subject should meet one of the following criteria * pigmentary retinopathy in both eyes * reduced response in photopic or scotopic electroretinogram in both eyes * photoreceptor degeneration in optical coherence tomography in both eyes Exclusion Criteria: * unilateral retinal disease * Subject who had previously confirmed genetic testing * Age less than 4 months or more than 75 years * When congenital infection or trauma are suspicious for the cause of retinal disease * When age-related macular degeneration, myopic degeneration, autoimmune origin are suspicious for the cause of retinal disease * No visual impairment or normal electroretinogram (e.g., benign fleck) * Illiterate subject who can not understand informed consent * Foreigners