After his cultivation and Dao attainment were elevated once again, his Heavenly Eye improved in tandem. Under his gaze, the scores of old men were seen as clearly as if they weren't wearing a stitch of clothing.
Don't get any wild ideas! Here it refers to their cultivation and Dao attainment, not literal nudity.
Li Daofeng was a man, after all; he had no interest in looking at an old man's meat and two veg. Besides, at their advanced age, even with cultivation, some things—unless you reverted to childhood—were bound to wither away. That was simply unavoidable!
Chapter 377