My baby, just 2 months old now, is also diagnoised with moderate deafness and mild deafness in left ear and right ear respectively. At the outset, I also felt very worry but my doctor pacified me that he might be alright or better when he is growing old. Hope everything could be alright.
I knew a friend who is deaf in a ear but does well in normal life. This enlightens my hope and just wanna to share with both of you.
Actually, all of your babies would be alright soon. Don't worry.