You may be excused if you have a serious health problem. If you are sick or injured, you may postpone your service or request an excuse. If you are disabled, you may request a permanent medical excuse. Follow the directions on the summons for postponement or excuse.
Any access questions or requests for assistance can be conveyed to the central jury staff, court clerk or judge in the courtroom where you are assigned. I'm over 70; why am I still being called for jury duty? There is no maximum age limit for jury service.
By law, the courts will excuse from jury duty anyone with a mental or physical condition that would keep them from serving as a juror. There is not an exemption based on age, but you may request to be excused if you have a hardship that would make it difficult to serve.
Most jurisdictions allow for deferrals and excusals from jury duty. You usually can't be excused from jury duty because of your employment status. You may be able to be deferred from a particular reporting day because of work requirements, but generally not excused completely.