Providing the man's age functions to add two elements to the miracle.
Magnify the nature of the miracle.
Add symbolic meaning to the miracle.
Magnify the Miracle
The man had been in the condition since birth:
1 Now Peter and John were going up to the temple at the hour of prayer, the ninth hour. 2 And a man lame from birth was being carried, whom they ...
To get the answer, it's necessary to go back to Acts 3:1 and read through to verse 11. There's too much to copy here, so in summary this was Peter and John going into the temple in Jerusalem. At the gate a man born lame lay there begging. The apostles did not give him alms but got him to look at them while those magnificent words was said to him, "...
What does Acts 4:22 mean by referring to the age of the man that was healed?
As OzzieOzzie's answer points out, the man was "lame from birth". (Acts 3:2) There is another similar incident that we can reference that has additional insight.
In John chapter 9, we read about Jesus' miracle of restoring sight to a man born blind. When the man is being ...
For the man who was miraculously healed was over forty years old.What does Acts 4:22 mean by referring to the age of the man that was healed?
The above verse refers to the beggar, at Acts 3:1-10, when he saw Peter and John began asking for a charitable gift.
Acts 3:1-10 NASB
Healing the Beggar Who Was Unable to Walk
3 Now Peter and John were going up to ...
In my view when it says that the man was over fourty years of age with blindness, it possibly tells us that even in an advanced age, he could be healed by Christ, for in that time it could be that:
a man could be healed by doctors when younger with that disease;
as it's confirmed by Barnes and Clarkes respectively:
For the man ... - The age of the man is ...
We are not told. All we can assume is that the man was like all during the entire ministry of Jesus coming and going from the temple. That is, depite Jesus presumably passing the man several times, Jesus never healed the man.
Thus, it might be possible to understand this as a fulfillment of Jesus' prophecy to the disciples:
John 14:12 - Truly, truly, I tell ...