Upper Arm Blending/Lower arm thinning

Hi there, to keep a long story short I experienced laser induced growth a few years ago on my arms, shoulders and back. I simply wanted to reduce arm hair and remove all back hair. Since then I had changed laser practitioner as I believed the area was too large to cover by electrolysis, it has been working and I am close to 80% reduction. However, the laser has changed the nature of my arm hair and so it is now very long, this is especially noticeable on the upper arm since it now goes from long to nothing and has left a stark line. Has anyone experienced a similar situation? and more importantly used electrolysis to create a natural blend from long hair to no hair? Any input would be appreciated.