Many elderly people do not take vision loss seriously, and they think it is normal for them to spend their eyesight as they get older. However, some eye diseases, if not treated in a timely manner, will lose the best treatment time, affecting the effectiveness of treatment and even lead to blindness, such as central retinal artery obstruction. Central retinal artery obstruction Common causative factors: 1. Common diseases of the central retinal artery include: atherosclerosis, spasm, inflammation, external compression, embolism obstruction, etc.; 2. Other factors. Main manifestations: sudden and painless loss of vision. Certain cases have a history of paroxysmal blurring of vision prior to onset. Reasons for timely medical attention: Animal experiments have shown that “rhesus macaques with atherosclerosis and arterial hypertension produce almost total optic nerve atrophy after more than 4 hours of onset”, which means that the shorter the onset time, the better the treatment effect. Therefore, if an elderly person experiences a sudden loss of vision without eye pain, it is important to seek early medical attention and be given salvage treatment as soon as possible. Emergency measures at home: 1, if you have nitroglycerin, immediately sublingual; 2, appropriate force compression of the affected eye (if the grasp is not good, this is not recommended); 3, if there is oxygen, immediately inhale oxygen (but do not delay the time to go to the hospital)