As already suggested by another commenter, continuing with web development, but with a focus on UX and accessability strikes me as the "shortest shift". It will

As already suggested by another commenter, continuing with web development, but with a focus on UX and accessability strikes me as the "shortest shift". It will potentially also give you a constructive outlet for the stress of loosing your vision (helping make sure others in a similar situation have a better experience with the product/sites you work on). I imagine working as a specialized a11y consultant is likely to be a safer and better compensated niche than as a "regular" designer/developer. Your personal experience and necessary adjustments would probably also allow you to work in similar fields, like working on native apps that need to be accessible to people with poor vision (ie: all of them, but especially those related to work functions, like logistics, cashier/bank, archiving/document management and probably lots I'm forgetting - where there might be regulations that must be passed in order to be able to deliver on bids).