We, therefore, decided to carry out a genetic correlation analysis between DRD2 and DRD4 genetic polymorphisms and the following behavioral phenotypes: diuretics, diets pills, laxative and drug abuses, food restriction, water restriction, fasting, alcohol abuse, excessive physical activity in all three groups, while vomit and binge eating reward with a frequency of ≥7 times/week observable in patients with BN ad BED only. The gene discussed is DRD4; the disease is X-linked cone dysfunction syndrome with myopia.