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Down syndrome or Down's syndrome, [12] also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability , and characteristic physical features.
There are many diseases known to cause ocular or visual changes. Diabetes , for example, is the leading cause of new cases of blindness in those aged 20–74, with ocular manifestations such as diabetic retinopathy and macular edema affecting up to 80% of those who have had the disease for 15 years or more.
Brushfield spots tend to be obscured by pigmentation of the anterior border layer of the iris in patients with darker irides. Hence, they are much more likely to be observed in children with lightly pigmented eyes. Brushfield spots are more commonly found in Down syndrome patients of European descent than similarly affected children of Asian ...
This is the most typical cause of down syndrome. Mosaic Down syndrome : Only some cells in the person have an extra copy of chromosome 21. This genetic cause is considered rare.
This is a list of major and frequently observed neurological disorders (e.g., Alzheimer's disease), symptoms (e.g., back pain), signs (e.g., aphasia) and syndromes (e.g., Aicardi syndrome). There is disagreement over the definitions and criteria used to delineate various disorders and whether some of these conditions should be classified as ...
As it turns out, your eyes could be raising some major red flags about your health, according to Dr. Oz The Good Life. From high cholesterol to diabetes, the signals your peepers could be sending ...
DOOR syndrome; Dopamine dysregulation syndrome; Down syndrome; Dravet syndrome; Dressler syndrome; Drug reaction with eosinophilia and systemic symptoms; Dry eye syndrome; Duane syndrome; Duane-radial ray syndrome; Dubin–Johnson syndrome; Dubowitz syndrome; Dumping syndrome; Dysexecutive syndrome; Dyskeratosis congenita; Dysplastic nevus syndrome
This is a partial list of human eye diseases and disorders. The World Health Organization (WHO) publishes a classification of known diseases and injuries, the International Statistical Classification of Diseases and Related Health Problems , or ICD-10.