Yes. See, for instance, https://www.researchgate.net/publication/8326382_Influence_of_ethnic_origin_on_the_incidence_of_keratoconus_and_associated_atopic_dise

Yes. See, for instance, https://www.researchgate.net/publication/8326382_Influence_of_ethnic_origin_on_the_incidence_of_keratoconus_and_associated_atopic_disease_in_Asian_and_white_patients https://www.researchgate.net/publication/8326382_Influence_o... and for some wider background and reassurance see: https://www.researchgate.net/publication/38114212_Commentary_The_background_and_outcomes_of_the_first-cousin_marriage_controversy_in_Great_Britain https://www.researchgate.net/publication/38114212_Commentary...