Calcium Channel Blockers for Hypertension may Increase Glaucoma Risk

 According to this study:

"an adverse association between Calcium Channel Blocker (CCB) use and glaucoma was observed, with CCB users having, on average, 39% higher odds of glaucoma. Calcium channel blocker use was also associated with thinner mGCIPL and mRNFL thicknesses, providing a structural basis that supports the association with glaucoma. The lack of association of CCB use with IOP suggests that an IOP-independent mechanism of glaucomatous neurodegeneration may be involved. Although a causal relationship has not been established, CCB replacement or withdrawal may be considered should glaucoma progress despite optimal care."

Melatonin and Risk of Macular Degeneration

In this studystudy:

"Researchers found that melatonin reduced the risk of age-related macular degeneration by more than half."

This is exciting news, but the study needs to be confirmed with more controlled studies.  

Exercise and Cataracts

According to this study:

"moderate to vigorous physical activity with higher frequency and longer duration will causally reduce the risk of senile cataracts"