semi blind older dog is showing aggression towards new puppy

Question
HI,
I DON'T KNOW WHO TO TURN TO. I'M ABOUT TO START CRYING AS I WRITE THIS MESSAGE. I HAVE A 10 YEAR OLD MALE (NON NEUTERED) SHIH TZU THAT I HAVE HAD SINCE I SAW HIM BEING BORN. HIS MOTHER (MITZI) PASSED AWAY ON 7-13-07 AND THEN 9-9-07 I FOUND OUT THAT HIS RETINA'S HAD DETACHED IN BOTH EYES. SO, HE HAD REATTACHMENT SURGERY MID SEPT. BUT BEFORE WE FOUND OUT ABOUT HIS EYES WE HAD ALREADY PUT A DEPOSIT ON A FEMALE SHIH TZU ABOUT A MONTH AFTER MITZI PASSED AWAY. WE WAITED UNTIL HE HAD REGAINED A GOOD BIT OF HIS EYESIGHT (50 TO 60 PERCENT) BEFORE WE BROUGHT HER HOME. WE LET HIM SMELL HER SCENT ON US A COUPLE OF TIMES AND THEN WE BROUGHT HIM ALONG ON THE DAY WE PICKED HER UP ON (10-2). HE DID NOT SEEM STRESSED OUT ANY (DROOLING). HE DID TRY AND STAY AWAY FROM HER IF POSSIBLE. HE DOES PUT HER IN HER PLACE A FEW TIMES A DAY WITH A BARK, BUT AT LEAST ONCE A DAY HE JUMPS ON HER CAUSING HER TO CRY. BUT TODAY HE WAS HORRIBLE! I WOKE UP THIS MORNING TO LET THEM OUT (HE SLEEPS W/US AND SHE SLEEPS IN A CRATE) THEY BOTH WENT POTTY. SO, I PUT HER IN THE BED WITH US, HOPING TO GO BACK TO BED. FYI: I DID THIS YESTERDAY MORNING TOO.  ANYWAY, HE BARKED AT THERE TWICE AND SCARRED HER AWAY AND THEN ALL OF A SUDDEN HE SLAMS UP AGAINST MY FOREHEAD AND I FEEL A CUT WITH A LOT OF BURNING. HE HAD REALLY TRIED TO ATTACK HER, BUT GOT ME INSTEAD! I KNOW THAT HE DIDN'T SEE ME LAYING SO CLOSE TO HER. HE HAS NEVER HURT ME BEFORE!! I DON'T KNOW WHAT TO DO? I'VE NEVER LEFT HER ALONE WITH HIM WHILE I'M NOT AROUND, I FEED HIM FIRST (TRY TO), I GIVE HIM LOADS OF ATTENTION AND I WALK THEM TOGETHER. I HAVE SEARCHED THE INTERNET TRYING TO FIND OUT WHAT I SHOULD DO, BUT THERE JUST ISN'T ANY INFORMATION OUT THERE FOR SOME ONE WHO IS IN MY SITUATION.  MEANING, A DOG WHO DOESN'T HAVE FANTASTIC VISION, LOSING HIS MOTHER AND NOW HAVING A NEW PUPPY COME INTO THE HOME. THE VET TOLD ME THIS WEEKEND THAT HIS VISION WAS 'FAIR" BUT NOT SO GREAT AT NIGHT. WE HOPE THAT IT WILL IMPROVE. THANK YOU FOR LISTENING  

Answer
Hello Christi, sometimes it will take an older dog time to accept a younger or new dog to the home.  My older poodle took one entire month to accept my new puppy.  Whether or not he can see her, he can still smell her and hopefully in time he will accept the presence of a new dog.  Do as you are doing now by taking measures to protect her.  I know this is upsetting and also disappointing, give it time.  also go to this website for additional help.  www.cesarmilaninc.com  Thanks for asking, Cindy Lou :)