As for cataracts, two meta-analyses confirm a correlation between high serum concentrations of lutein and zeaxanthin and a decrease in the risk of nuclear cataract, but not cortical or subcapsular cataract.
2.
Two meta-analyses confirm a correlation between high diet content or high serum concentrations of lutein and zeaxanthin and a decrease in the risk of nuclear cataract, but not cortical or subcapsular cataract.
3.
The researchers found that those who had used the inhalers had a 50 percent higher-than-average risk of developing a cataract in which a central part of the lens is clouded, called a nuclear cataract, and a 90 percent greater risk of developing a more serious but less frequent cataract that affects the back of the lens, called a posterior subcapsular cataract.