The Question and Answer section for The Love Song of J. Alfred Prufrock is a great resource to ask questions, find answers, and discuss the novel.
I'm sorry, I do not understand your question as asked. Please rephrase your question, particularly in regard to "types of ages".
The lines are:
When the evening is spread out against the sky
Like a patient etherized upon a table;
This represents the speaker' feeing unable to find confidence or passion to make his life better, Like a patient etherized upon a table.
The speaker is Prufrock himself.