XYZ, O.D.,RE:  ABC,DOB:  MM/DD/YYYY,Dear XYZ:,Thank you very much for your kind referral of Mrs. ABC who you referred to me for narrow angles and possible associated glaucoma. 
XYZ , O.D.,RE : ABC , DOB : MM / DD / YYYY , Dear XYZ:,Thank you very much for your kind referral of Mrs. ABC who you referred to me for narrow angles and possible associated glaucoma .