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.
Every time I call its real long wait times, spent 68 minutes waiting for a cust service rep this morning finally had to hang up. This is unacceptable the last time hung up after 45 mins and the time before someone answered at the 38 min mark. its obvious that there are not many reps to answer phones or the DD phone apps just don't work.