Pam, I am so very sorry to hear this and I will definitely be praying for your son. I do hope the doctors will find a way to correct the blindness in his right eye. I know this must worry you very much but, like you said, God does have a purpose for him so praise Him always. God loves to hear our prayers and wants us to put all our faith in Him so He can show you His Providence. Please keep us updated.
Love and Prayers ~