is leutian a good eye supplement

If you mean lutein, it may help slow vision loss in moderate-to-severe age-related macular degeneration (AMD), but it hasn’t shown significant vision improvement for people with normal vision or mild AMD. 1

• Macular pigment and visual acuity: A trial involving a lutein-enriched drink reported increased macular pigment density and visual acuity; the discussion notes that benefits from supplementation depend on the condition being treated. 2 3
• Lutein with zeaxanthin: In the AREDS-2 formula, lutein and zeaxanthin were associated with slower progression of dry AMD in the moderate-to-severe group. 4

So, lutein isn’t a proven general vision booster; its clearest potential use is as part of an eye-doctor-guided approach for AMD. 5