"It's one of the first 3, and some reason I doubt its the 3rd supplement for the eyes."
Don't rule out lutein!
https://www.ncbi.nlm...les/PMC8223987/
"Three intervention studies using MRI indicated that 10 mg lutein intake over 12 months had a positive impact on healthy older adults’ brain activities during learning, resting-state connectivity, and gray matter volumes. Four cross-sectional studies using MRI suggested that lutein was positively associated with brain structure and neural efficiency during cognitive tasks. Conclusion: Although only nine studies that used similar datasets were reviewed, this systematic review indicates that lutein has beneficial effects on healthy older adults’ brain health."
Also may protect dopamine cells:
https://pubmed.ncbi....h.gov/25730317/
How much lutein are you taking?