Calling on God!!! Please be there...

I received a very troubling call last night. My mother was at the other end and she was distraught. Through her tears she told me that my dad had been told he has ocular cancer.. He was given the choice to have his eye removed or have radiation therapy. He has decided to have his eye removed.
His eye had been bothering him so he went to the eye doctor and they said he had a cataract that needed to be removed. Then at his next appointment they said that his retina had detached from the eye. So he was sent to see an eye specialist yesterday and they told him he had ocular cancer. This is so unreal. Who knows how long he has had this.
At first I was troubled about the news, but the longer it has set with me I feel so confused and lost with this. If anyone know my dad they know that he is one of the most caring souls on this earth. For me to think that he would have to suffer really hurts me. My dad sounded optimistic on the phone because he has such great faith. That is one thing about him, he can lose his hair, his teeth, gallbladder and eye, but nothing can take away his faith. He was also being strong for my mom, cause she has had her bouts with cancer before. When she was 29 she had cervical cancer and then years later on different occasions she has been inflicted with Paget's disease a skin cancer and had to have skin grafts. Needless to say she has been through it and doesn't want my dad to have to go through what she did.
I just hope that it is all going to be ok. I trust that God will not put us through more than we can bare. I ask that you all will pray for my dad. Pray he will get through this with minimal suffering. I love him so much and I can't stand that he has been given this lot to carry. My dad is a preacher and he is the most selfless human I know. God, please take care of my dad. Be gentle, he is so good. He would never hurt anyone. He so doesn't deserve this I just want to hear that they made a mistake and this is just a bad dream.