The human eye is an impressively complex organ, so much so that some argue the human eye is proof of the existence of a designer. This theory is often referred to as ‘Irreducible Complexity’. It is simply put, the idea that removing any one part from a single system of interacting parts renders the system useless. In this sense, removing a single gear from an engine, means the entire engine would cease to work.

Those arguing the theory of design or irreducible complexity feel that the eye’s intricacy is a solid example of this theory… however, Essilor have produced this video which takes a look at how the human eye could have evolved. Narrated by Science Communicator Alom Shaha, the video takes us through various components of the eye and how they are used by single celled organisms, sea creatures, birds, and humans – examples of the how the eye could develop incrementally.

It also discusses how best to protect our eyes from dangers that evolution hasn’t equipped us to deal with. There’s a plethora of dangers to the eye in the modern day, but luckily, there are ways to prevent damage to them!

UV Radiation

Exposure to UV light comes primarily from direct sunlight, however, we also receive UV exposure via reflections from glass buildings, water, the ground, and even the rear side of your glasses. The rays from this light can lead to premature aging of the eyes and cataracts. Preventing or limiting contact with UV light is simple enough, by wearing sunglasses (or clear lenses) with a UV filter front and back of the lenses.

Blue Violet Light

Modern day life often involves staring at screens all day, and often late at night, however this exposes us to Blue-Violet light which can be harmful to retinal cells and lead to premature aging of our eyes. LED and Sunlight are also potential sources of Blue-Violet light. The best way of preventing damage from these rays is to wear lenses that protect from Blue-Violet light, however be sure the lenses don’t filter out blue-turquoise light as this assists in a healthy sleep cycle!

Excessive Screen Use

Further relating to the potential damage from staring at screens all day, is another risk – CVS (Computer Vision Syndrome.) CVS is a side effect of staring at computer screens for too long. The constantly shifting change in focus and eye position can cause blurred vision, sore eyes, and headaches. The best way to prevent damage from eye strain or CVS is to take regular breaks from the screen. Blink often to keep eyes moist, and every 20 minutes look away from the screen for 20 seconds at an object 20 feet away. The best way to keep your vision 20/20!

Lifestyle

Diet and exercise play an integral part to your overall health, not just your eyes. Eating a balanced diet with various vitamins and nutrients will lower your risk of cataracts; ensure your blood pressure remains low to also reduce the chance of other complications. Eat healthily, get regular exercise, and have your eyes check every two years!