Iridology

19/10/2026

👁️ Scientists have identified a protein that may be preventing damaged eyes from repairing themselves, opening a possible new approach to restoring lost vision.

Unlike animals such as zebrafish, which can naturally replace damaged retinal neurons, mammals have very limited regenerative abilities in their eyes. Once these specialized cells are destroyed, the resulting vision loss is often permanent.

This is one reason diseases such as glaucoma and age-related macular degeneration remain so difficult to treat.

Now, researchers have identified a potential barrier to retinal regeneration: a protein called PROX1.

The protein helps regulate the behavior of cells in the retina, but it may also prevent certain supporting cells from transforming into new neurons after an injury.

Scientists investigated whether blocking PROX1 could remove this restriction and reactivate the retina's natural repair mechanisms.

In experiments involving mice, suppressing the protein encouraged retinal support cells to acquire regenerative properties and produce new neurons, helping repair damaged retinal tissue.

The researchers also reported improvements in visual function that persisted over time, suggesting that the newly generated cells could contribute to restoring sight.

The findings raise an intriguing possibility: some of the biological processes needed for retinal repair may still exist in mammals but remain suppressed by molecular signals.

However, these results come from animal experiments. Scientists have not yet demonstrated that blocking PROX1 can safely regenerate human retinal cells or reverse blindness in patients.

Further research is needed to determine whether this approach could eventually benefit people with degenerative eye diseases.

Still, the discovery offers a promising direction for regenerative medicine, where future treatments might do more than protect surviving retinal cells. They could potentially help the eye replace some of the cells it has already lost.

📃 RESEARCH PAPER

📌 Kim, M., Lee, E. J., & Kim, J. W. “PROX1 inhibition restores vision through retinal neural regeneration.” Nature Communications.

19/10/2026

Loa loa is a parasitic roundworm found mainly in West and Central Africa, transmitted through infected deer fly bites.

Adult worms live beneath the skin and can migrate across the eye’s conjunctiva, sometimes visibly moving across its surface.

The infection can cause temporary skin swellings, eye irritation, redness, and discomfort. Female worms release microscopic larvae into the bloodstream, which are taken up by deer flies and develop into infective larvae, continuing the cycle.

Treatment requires medical supervision because severe reactions can occur when parasite levels in the blood are high.

Source: CDC, DPDx: Loiasis; CDC Clinical Care of Loiasis.

13/10/2026

When oxygen levels fall, your cells activate a molecular response system controlled by HIF-1, the hypoxia-inducible factor.

Under normal oxygen conditions, HIF-1α is rapidly broken down. When oxygen becomes scarce, it stabilizes, partners with HIF-1β, and activates genes that help cells adapt to hypoxia.
These changes can increase red blood cell production, promote new blood vessel formation, and shift cellular energy metabolism.
Your cells can begin changing their behaviour before you consciously recognise that oxygen availability has changed.

A molecular switch. A cellular response. A survival strategy.

09/09/2026

🩸 Your kidneys contain millions of microscopic blood filters — and this is one of them.

This tiny structure is called the glomerulus. It is a network of capillaries inside each nephron, where the first major step of kidney filtration takes place.

Blood enters the glomerulus under pressure. Water and small dissolved substances can pass through the filtration barrier, while blood cells and most proteins are normally kept in the bloodstream.

The filtered fluid then enters Bowman’s capsule and continues through the kidney tubules, where your body reabsorbs what it needs and removes what it doesn't.

The incredible part? You have roughly one million nephrons in each kidney.

And when the kidney's filtration barrier becomes damaged, proteins such as albumin can leak into the urine — which can be an important warning sign of kidney problems.

So the next time you think about your kidneys, don't just think about urine.

Think about millions of microscopic filtration systems constantly sorting your blood.

🔬 One tiny structure.
A massive biological job.

Would you have guessed that this image was part of a human kidney? 👇

09/09/2026

Your brain has a tiny structure that helps turn experiences into memories. 🧠

The hippocampus plays a crucial role in forming new memories and is also involved in learning and spatial navigation.

When the hippocampus is damaged, a person may still remember parts of their past while having serious difficulty forming new memories.

One small structure.
A huge role in what you remember.

Did you know this part of your brain existed? 👇

08/09/2026

Your cornea is one of the most remarkable structures in the human body. 👁️

It’s the transparent outer layer of your eye that helps focus light—and unlike most tissues, it has no blood vessels. Instead, it gets oxygen primarily from the air through your tears and the surrounding environment.
Even more fascinating: the cornea contains an incredibly dense network of sensory nerves, making it extremely sensitive to injury and irritation.
Your eyes are doing extraordinary work every second—without you even noticing. 🧠👁️
Follow for more fascinating human body facts, anatomy, medical science, and health education.

29/08/2026

THE GLYMPHATIC SYSTEM 🧠
Your brain has a hidden cleanup system that becomes especially active during sleep.

The glymphatic system helps move cerebrospinal fluid through brain tissue and supports the clearance of metabolic waste.
But here’s the fascinating part:
Why is sleep so important for this process?
What waste is being cleared?
And what happens when brain waste clearance is disrupted?
Your brain may be cleaning itself while you sleep. 🧠💤

21/08/2026

15/08/2026

Inside your inner ear are only about 3,500 inner hair cells — tiny biological sensors that convert vibration into the electrical signals your brain hears as music, speech, and memory. Unlike many cells in the body, they do not naturally regenerate once damaged. Hearing is not just sound; it is precision measured at the nanometer scale.