about 8 years ago i had eye tests done, and i came out 20/15. ie, i can read at 20 what normal is at 15. blue light is a big hassle with vision, always makes everything more fuzzy. so in other words, i don't think i have that type of prismatic aberration in my vision system. i have slight impairment with close vision, i think maybe when i was a kid i could read text at about 4 inches, and now, 6. the optometrist said that a +0.5 lens would help with this but she also said it was so trivial as to be not important. plus i did the test while i was fatigued and zinging out after too many cups of tea.

oh, i do get visual migraines from time to time though. but i think that is purely a visual processing fault not optical.