Eye,Contact Lenses&Lack Oxygen
The Eye (cornea) Does Not Need Oxygen
Do you still believe that your eye(cornea) needs oxygen(oxygen supply)? Perhaps you don’t know about mitochondria.
If you wear contact lenses, you have probably been told that you risk damage to your cornea from a lack of oxygen.
This is a myth.
Mitochondrial DNA & Respiration
Have you ever heard of mitochondria?
The mitochondrion is an “organelle” that exists in every cell of your body.
Mitochondria have a unique structure which is passed on to you from your mother’s DNA(mitochondrial DNA).
The mitochondrion works as a power-plant, making energy by consuming oxygen and pyruvic acid which is metabolized from glucose(mitochondrial respiration).
So, you can’t live without it.
Red Muscle Fibers vs White Muscle Fibers=Cardio Or Not
Did you know that we have both red and white muscle?
Mitochondria are prevalent in your red muscle which is responsible for long term muscle movement such as jogging and aerobics, and powers everyday actions.(=cardio)
The red colored muscle comes from the presence of oxygenated myoglobin and mitochondria, which are both partially red to begin with.
First, oxygen is transported by hemoglobin through your blood vessels to myoglobin in your muscles and delivers mitochondria.
On the other hand, the muscle responsible for short team movement such as sprinting and weight-training is the so-called “white muscle.”
White muscle has much less myoglobin and mitochondria.
The point is the cell has less mitochondria and therefore can’t utilize oxygen even if you take a lot of breaths.
Now you probably understand how your mitochondrion works in your cell, don’t you?
MuscleFibers/TypeⅠ, TypeⅡa Or TypeⅡx?
Red muscle is also called TypeⅠfibers or slow-twitch muscle fibers.
White muscle is also called TypeⅡx fibers or fast-twitch muscle fibers.
Midiam colored muscle is called TypeⅡa fibers or moderate fast-twitch muscle fibers.
Let’s get back to the cornea.
Your cornea can’t utilize oxygen because it doesn’t have sufficient mitochondria.
This is certified by a DNA appraisal.
Ultraviolet lights (rays) Radiation&Active Oxygen
DNA analysis shows the fact that your cornea can’t breathe
Toshio Tsubai, MD, a biochemist at Osaka University Medical School who has conducted over thirty years of research on ocular surface biochemistry, discovered that the cornea has an unusual metabolic system which can reduce oxygen and produce antioxidants. This system enables your cornea to produce antioxidants which leads to the reduction of oxygen.
Initially, he wanted to understand why although ultraviolet light makes a crystalline lens cloudy, it seems to have no effect on the cornea.
This is mysterious indeed.
Everyone who is aging can be diagnosed with cataracts, however getting older itself does not seem to cause cloudy symptoms in the cornea.
Your cornea receives more exposure to ultraviolet lights(rays) than your crystalline lens.
UV reacts with oxygen to generate active oxygen.
Active oxygen can harm your cells and age them, but your cornea never gets old like your crystalline lens.
Here is the answer which the researcher found!
•Research before his study had experimented with rabbit eyes.
•Rabbits are nocturnal.
•These nocturnal corneas don’t need to reduce oxygen because they had low UV(ultraviolet radiation) exposure.
•He found cow and human corneas had different metabolism from that of nocturnal rabbits.
•From the result of DNA appraisal of human and cow corneas, he found mitochondria existed partially, but they were dysfunctional.
•This means that even though your conea can absorb oxygen, it can’t utilize oxygen. Not only that, by utilizing an unusual metabolic system, your cornea is able to erase active oxygen for its protection.
•He also discovered that many kinds of antioxidants were included in tears.
•Japan Contact Lens Society has claimed that tears are oxygen saturated and supply it to the cornea, but when measuring redox potential, there was in fact only one third of saturation.
•This unusual metabolism which is called PPP (Pentose Phosphate Pathway) utilizes G6P (Glucose-6-Phosphate) and reacts it with a large amount of water molecules and oxidized coenzyme NADP (Nicotinamid Adenine Dicnuleotide Phosphate), and then converts into reduced coenzyme NADPH and carbon dioxide.
•Reduced coenzyme NADPH can erase oxygen.
Based on all of this evidence, researchers have concluded that for observers who had no idea that the cornea could produce antioxidants and erase oxygen, an assumption that oxygen was absorbed, and carbon dioxide was emitted could make them believe the cornea needs oxygen to breathe.
And yet the fact is your cornea cannot breathe in the first place due to the scavenging function.
That is why your cornea can remain transparent your whole life without replacement!