I am scheduled for cataract surgery. Can I get insurance against loss of vision? 
Insurance is based upon the law of large numbers . Your concern is legitimate ; however , it is probably not shared by a large number of people . In the face of a scheduled procedure you will find few companies who are willing to insure you against loss of vision . That is not to say that you can not get insurance . It might be available be through Lloyds of London . Individual underwriters will assume all or part of the risk and will then tell you the price . Brokers with access to Lloyds syndicates advertise . 