Scar tissue on the ear drum is usually caused by repeated ear infections. The scar tissue can lead to difficulty hearing and eventually ruptured ear drums. Surgery is one means of avoiding progressive hearing loss or ear drum rupture. No patients have reported taking Scar tissue removal (eardrum).
USCIS normally responds to RFE's within 60 days, however they do not have processing times on how long it takes them to respond. It can be longer than that. I would call the USCIS number: 1 (800) 375-5283 and submit a service request, if you do not hear from them soon.
Sometimes business or personal matters make it impossible to serve on the date shown on your summons. In that case you may ask to postpone your jury service. Give the earliest date you will be able to serve. You can ask to have your jury service postponed by calling (619) 450-5757. Your service may be postponed for up to 6 months for any reason. You can also postpone your service by clicking here.