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Optic disc drusen in children with Down syndrome, as evidenced by fundus imaging and ocular B-scan ultrasound. (A,C) Optic disc drusen in two children with Down syndrome; a spoke-like vessel pattern is evident in (A). The optic discs appear smaller, with no physiological cupping. (B,D) Ocular B-scan ultrasound in the same patients, showing ovoid echogenic lesions, with acoustic shadow, at the junction of the retina and the optic nerve.
