Juvenile cataract - microcornea - renal glucosuria is an extremely rare autosomal dominant association reported in a single Swiss family and characterized clinically by juvenile cataract associated with bilateral microcornea, and renal glucosuria without other renal tubular defects. The disease is Orphanet rare-disease nomenclature identifier Orphanet_247794 (Juvenile cataract - microcornea - renal glucosuria).