Michael Healy

Researchers have long been fascinated by the inhabitants of Blue Zones, the various regions around the world known for having populations with exceptionally long lifespans. People living in Blue Zones typically live the longest lives of anyone in the world, consistently reaching age 100. In contrast, the average life expectancy in the U.S. is currently just over 76 years.

One of the most intriguing, but often overlooked, health aspects is the remarkably better eyesight observed in residents of these Blue Zone communities. From Okinawa, Japan, to Sardinia, Italy, and Nicoya, Costa Rica, individuals in Blue Zones seem to defy the aging process—especially when it comes to their vision and the overall health of their eyes.

There are a number of factors contributing to the superior eyesight of those living in these Blue Zones and also a number of important lessons we can learn from their lifestyle choices.

Our eyes are intricate and delicate structures that are essential for how we perceive the world. While it’s easy to take your vision for granted, occasional abnormalities can occur and when they do, they often cause serious alarm and concern.

One such unsettling occurrence is the appearance of a subconjunctival hemorrhage, or the presence of blood in the eye. 

The presence of a subconjunctival hemorrhage can be especially alarming when it shows up in the conjunctiva, or the thin, clear membrane that protects the eye, the inside of the eyelid, and the sclera (the white part of the eye).

While the presence of blood in your eye can be quite alarming at first glance, understanding its causes, risk factors, and potential treatments can help alleviate fears and even improve your overall eye health.