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.
* Court approved emergency settings excepted for which as much notice as possible is required. Appearance Procedure 1. It is the responsibility of the person making a telephone appearance to dial into the call no later than five (5) minutes prior to any scheduled hearing(s), and to check in with the CourtCall clerk. 2. Persons appearing telephonically shall state his or her name for the record each time he or she speaks.