The evidence is mixed. One study found that regularly consuming too much calcium from supplements or antacids was associated with a higher
risk of developing age-related macular degeneration (AMD). In contrast, another study did not find a higher risk of AMD with supplements. In fact, it found that women with high intake of calcium from supplements had a lower
risk of a particular form of AMD (neovascular or "wet" AMD) than those who did not supplement with calcium.
Calcium from foods
does not appear to have a negative effect on AMD and may, to some extent, reduce the risk of AMD.
For details, see the What It Does
section of the Calcium Supplements Review.
For supplements that can help with AMD, see the Vision Supplements Review