in guideline Abnormal Cardiovascular System Morphology Central Retinal Artery Occlusion Suggest update to description SCD Management guidelines - Jamaica HP:0025342 Blockage of blood flow in the central retinal artery. Results in sudden painless loss of vision and occurs in children and young adults. Thrombus formation in the retinal artery occurs spontaneously or in association with hyphema, Moyamoya and acute chest sydrome. There is no associated pain and it may be unilateral or bilateral. Suggest update to description in HPO Sickle Cell Disease: The Clinical Care Guidelines of the Sickle Cell Unit Consensus Statement on the Care of Patients with Sickle Cell Disease in Canada Sickle Cell Disease in Children, Standards and Guidelines for Clinic Care Evidence-Based Management of Sickle Cell Disease