11 Things That Can Change Your Eye Color
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Eye color is generally considered so static that iris scans are considered a reasonable security method. However, it can indeed change—mostly for reasons you won’t want, though:
Ringing the changes
Putting aside any wishes of being a manga protagonist with violet eyes, here are the self-changing options:
- Aging in babies: babies are often born with lighter eyes, which can darken as melanocytes develop during the first few months of life. This is similar to how a small child’s blonde hair can often be much darker by the time puberty hits!
- Aging in adults: eyes may continue to darken until adulthood, while aging into the elderly years can cause them to lighten due to conditions like arcus senilis
- Horner’s syndrome: a nerve disorder that can cause the eyes to become lighter due to loss of pigment
- Fuchs heterochromic iridocyclitis: an inflammation of the iris that leads to lighter eyes over time
- Pigment dispersion syndrome: the iris rubs against eye fibers, leading to pigment loss and lighter eyes
- Kayser-Fleischer rings: excess copper deposits on the cornea, often due to Wilson’s disease, causing larger-than-usual brown or grayish rings around the iris
- Iris melanoma: a rare cancer that can darken the iris, often presenting as brown spots
- Cancer treatments: chemotherapy for retinoblastoma in children can result in lighter eye color and heterochromia
- Medications: prostaglandin-based glaucoma treatments can darken the iris, with up to 23% of patients seeing this effect
- Vitiligo: an autoimmune disorder that destroys melanocytes, mostly noticed in the skin, but also causing patchy loss of pigment in the iris
- Emotional and pupil size changes: emotions and trauma can affect pupil size, making eyes appear darker or lighter temporarily by altering how much of the iris is visible
For more about all these, and some notes about more voluntary changes (if you have certain kinds of eye surgery), enjoy:
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Want to learn more?
You might also like to read:
Understanding And Slowing The Progression Of Cataracts
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One Cause; Countless Aches
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What Is The Cause?
Zac Cupples’ video (below) makes an appealing claim: 90% of movement issues and discomforts we experience daily come from one source: reduced joint space due to increased muscle tension.
For Cupples, this could be causing anything from knee pain to foot pain to ankle pain to hip pain to generalized joint pain to…pretty much any sort of pain.
So, why do we describe this as “appealing”?
Well, if there’s just one cause, that means there is only one thing to fix
Can This Be True?
Whilst we normally stray away from oversimplifications, we found Cupples’ example quite powerful.
Cupples defends his thesis by illustrating it with a simple wrist movement experiment: try moving your wrist in a circle with your palm open, and then do the same with your fist clenched.
Did you notice a difference?
When you clench your fist, movement (normally) becomes restricted and uncomfortable, illustrating how increased tension limits joint space.
It’s a powerful analogy for understanding our body’s mechanics.
So How Do We Fix It?
To combat issues with reduced joint space, Cupples proposes a three-step solution: reducing muscle tension, increasing range of motion in commonly limited areas, and enhancing movement efficiency. He delves into strategies for achieving these, including adopting certain positions and breathing techniques.
There are also some elements of strategic muscle engagement, but we’ll leave that to him to describe:
How was the video? If you’ve discovered any great videos yourself that you’d like to share with fellow 10almonds readers, then please do email them to us!
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Night School – by Dr. Richard Wiseman
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Sleep is a largely neglected part of health for most people. Compared to factors like food and exercise, it’s something that experientially we’re mostly not present for! Little wonder then that we also often feel like it’s outside of our control.
While Dr. Wiseman does cover the usual advices with regard to getting good sleep, this book has a lot more than that.
Assuming that they go beyond the above, resources about sleep can usually be divided into one of two categories:
- Hard science: lots about brainwaves, sleep phases, circadian rhythms, melatonin production, etc… But nothing very inspiring!
- Fantastical whimsy: lots about dreams, spiritualism, and not a scientific source to be found… Nothing very concrete!
This book does better.
We get the science and the wonder. When it comes to lucid dreaming, sleep-learning, sleep hypnosis, or a miraculously reduced need for sleep, everything comes with copious scientific sources or not at all. Dr. Wiseman is well-known in his field for brining scientific skepticism to paranormal claims, by the way—so it’s nice to read how he can do this without losing his sense of wonder. Think of him as the Carl Sagan of sleep, perhaps.
Style-wise, the book is pop-science and easy-reading. Unsurprising, for a professional public educator and science-popularizer.
Structurally, the main part of the book is divided into lessons. Each of these come with background science and principles first, then a problem that we might want to solve, then exercises to do, to get the thing we want. It’s at once a textbook and an instruction manual.
Bottom line: this is a very inspiring book with a lot of science. Whether you’re looking to measurably boost your working memory or heal trauma through dreams, this book has everything.
Click here to check out Night School and learn what your brain can do!
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Butternut Squash vs Pumpkin – Which is Healthier?
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Our Verdict
When comparing butternut squash to pumpkin, we picked the butternut squash.
Why?
Both are great! But the butternut squash manages a moderate win in most categories.
In terms of macros, butternut squash has more of everything except water. Most notably, it has more protein and more fiber. Yes, more carbs too, but the fiber content means that it also has the lower glycemic index, by quite a bit.
When it comes to vitamins, pumpkin does have a little more of vitamin B1 and a lot more of vitamin E, while butternut squash has more of vitamins B3, B5, B9, C, K, and choline. They’re about equal in the other vitamins they both contain. A fair win for butternut squash.
In the category of minerals, butternut squash has more calcium, magnesium, manganese, and selenium, while pumpkin has more copper, iron, and phosphorus. They’re about equal in potassium and zinc. A marginal win for butternut squash.
Adding up the strong win, the fair win, and the marginal win, makes for an easy overall win for butternut squash!
Want to learn more?
You might like to read:
Superfood-Stuffed Squash Recipe
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How To Avoid Self-Hatred & Learn To Love Oneself More
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Alain de Botton gives a compassionate, but realistic, explanation in this video:
The enemy within
Or rather, the collaborator within. Because there’s usually first an enemy without—those who are critical of us, who consider that we are bad people in some fashion, and may indeed get quite colorful in their expressions of this.
Sometimes, their words will bounce straight off us; sometimes, their words will stick. So what’s the difference, and can we do anything about it?
The difference is: when their words stick, it’s usually because on some level we believe their words may be true. That doesn’t mean they necessarily are true!
They could be (and it would be a special kind of hubris to assume no detractor could ever find a valid criticism of us), but very often the reason we have that belief, or at least that fear/insecurity, is simply because it was taught to us at an early age, often by harsh words/actions of those around us; perhaps our parents, perhaps our schoolteachers, perhaps our classmates, and so forth.
The problem—and solution—is that we learn emotions much the same way that we learn language; only in part by reasoned thought, and rather for the most part, by immersion and repetition.
It can take a lot of conscious self-talk to undo the harm of decades of unconscious self-talk based on what was probably a few years of external criticisms when we were small and very impressionable… But, having missed the opportunity to start fixing this sooner, the next best time to do it is now.
We cannot, of course, simply do what a kind friend might do and expect any better results; if a kind friend tells us something nice that we do not believe is true, then however much they mean it, we’re not going to internalize it. So instead, we must simply chip away at those unhelpful longstanding counterproductive beliefs, and simply build up the habit of viewing ourselves in a kinder light.
For more on all this, enjoy:
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Want to learn more?
You might also like to read:
- Escape From The Clutches Of Shame
- To Err Is Human; To Forgive, Healthy
- How To Get Your Brain On A More Positive Track (Without Toxic Positivity)
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Science-backed ways to take care of your mental health this winter
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The colder, darker months can take a toll on well-being. Two out of five U.S. adults say their mental health worsens in the winter. Plus, about five percent of U.S. adults experience seasonal affective disorder (SAD), a type of depression induced by seasonal changes that typically begins when the weather gets colder and there’s less daylight.
Fortunately, there are science-backed lifestyle changes that can make this time of year more tolerable. Here’s how to take care of your mental health this winter.
Exercise regularly
When you exercise, your body releases endorphins, or “feel-good” chemicals that can improve your mood. A 2024 review of studies found that exercise—particularly walking, jogging, yoga, and strength training—can reduce symptoms of depression.
Before starting a new exercise routine, talk to your health care provider about the types of exercise that may work best for you.
Get outside
While getting outside during the colder months may feel challenging, time outdoors—especially in nature—has been shown to decrease stress, depression, and anxiety. Plus, sunlight helps your body make vitamin D, which may improve your energy and mood.
You can reap the benefits of nature no matter where you live.
“Cities can be very energetic and exciting but also can contribute to both conscious and unconscious stress from the sensory overload and challenges of maneuvering in those spaces,” said Jodie M. Smith, a Mayo Clinic nurse practitioner, in a 2024 Mayo Clinic article. “If you live in an urban environment, exploring to find even a small natural reprieve can be extremely beneficial.”
Prioritize sleep
Inadequate sleep has been linked to depression and anxiety. Taking steps to improve the quality and duration of your sleep can help you become more resilient against stressors.
You can improve your sleep by going to bed and waking up at the same time every day; avoiding caffeine, alcohol, and large meals before bed; keeping your bedroom cool and dark; and limiting exposure to distressing media in the evening.
Practice gratitude
Research suggests that people who practice gratitude are less likely to experience depression. It can also help you make lifestyle changes that improve your well-being overall.
“Practicing gratitude may also make someone a bit more motivated to take care of their health,” said Tyler VanderWeele, co-director of the Initiative on Health, Spirituality, and Religion at the Harvard T.H. Chan School of Public Health, in a 2024 Harvard Health Publishing article. “Maybe they’re more likely to show up for medical appointments or exercise. It may also help with relationships and social support, which we know contribute to health.”
Add more gratitude to your life by sharing what you’re grateful for with others or keeping a gratitude journal.
Spend quality time with loved ones
“Social isolation and loneliness have a serious impact on physical and mental health, quality of life, and longevity,” according to the World Health Organization, with effects comparable to other risk factors like smoking.
Research shows that people who have close confidants are more satisfied with their lives and less likely to experience depression. Even after holiday gatherings have ended, schedule time with friends and family to stay positive and feel supported.
Limit cell phone use
Social media use and “doomscrolling” inflammatory news headlines are both associated with anxiety and depression across age groups, especially in teens.
“Excessive social media use is associated with behaviors, such as poor sleep, increased social comparisons, impact on learning, and exposure to cyberbullying and negative content, that could contribute to the worsening of depressive symptoms,” Dr. Carol Vidal, an assistant professor of psychiatry and behavioral sciences at the Johns Hopkins University School of Medicine, said in a Hopkins Medicine article.
Minimize the time you and your family members spend on your phones by pausing notifications, keeping your phone out of reach when you’re preparing for sleep, using a “grayscale” setting to make scrolling less enticing, and finding phone-free hobbies to enjoy.
Light therapy
Light therapy is one treatment for people who have been diagnosed with SAD. It involves sitting in front of a bright light box for 30 to 45 minutes per day to increase light exposure.
This treatment may not be right for people who take certain medications or have eye diseases. Talk to your health care provider about whether light therapy is right for you and what type of light box you should use.
Seek professional support
If your mental health over the winter interferes with your daily functioning, seek help from a therapist, support group, or mental health hotline. Find resources here.
This article first appeared on Public Good News and is republished here under a Creative Commons license.
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Sun, Sea, And Sudden Killers To Avoid
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Stay Safe From Heat Exhaustion & Heatstroke!
For most of us, summer is upon us now. Which can be lovely… and also bring new, different health risks. Today we’re going to talk about heat exhaustion and heatstroke.
What’s the difference?
Heat exhaustion is a milder form of heatstroke, but the former can turn into the latter very quickly if left untreated.
Symptoms of heat exhaustion include:
- Headache
- Nausea
- Cold sweats
- Light-headedness
Symptoms of heatstroke include the above and also:
- Red/flushed-looking skin
- High body temperature (104ºF / 40ºC)
- Disorientation/confusion
- Accelerated heart rate
Click here for a handy downloadable infographic you can keep on your phone
What should we do about it?
In the case of heatstroke, call 911 or the equivalent emergency number for the country where you are.
Hopefully we can avoid it getting that far, though:
Prevention first
Here are some top tips to avoid heat exhaustion and thus also avoid heatstroke. Many are common sense, but it’s easy to forget things—especially in the moment, on a hot sunny day!
- Hydrate, hydrate, hydrate
- (Non-sugary) iced teas, fruit infusions, that sort of thing are more hydrating than water alone
- Avoid alcohol
- If you really want to imbibe, rehydrate between each alcoholic drink
- Time your exercise with the heat in mind
- In other words, make any exercise session early or late in the day, not during the hottest period
- Use sunscreen
- This isn’t just for skin health (though it is important for that); it will also help keep you cooler, as it blocks the UV rays that literally cook your cells
- Keep your environment cool
- Shade is good, air conditioning / cooling fans can help.
- A wide-brimmed hat is portable shade just for you
- Wear loose, breathable clothing
- We write about health, not fashion, but: light breathable clothes that cover more of your body are generally better healthwise in this context, than minimal clothes that don’t, if you’re in the sun.
- Be aware of any medications you’re taking that will increase your sensitivity to heat.
- This includes medications that are dehydrating, and includes most anti-depressants, many anti-nausea medications, some anti-allergy medications, and more.
- Check your labels/leaflets, look up your meds online, or ask your pharmacist.
Treatment
If prevention fails, treatment is next. Again, in the case of heatstroke, it’s time for an ambulance.
If symptoms are “only” of heat exhaustion and are more mild, then:
- Move to a cooler location
- Rehydrate again
- Remove clothing that’s confining or too thick
- What does confining mean? Clothing that’s tight and may interfere with the body’s ability to lose heat.
- For example, you might want to lose your sports bra, but there is no need to lose a bikini, for instance.
- What does confining mean? Clothing that’s tight and may interfere with the body’s ability to lose heat.
- Use ice packs or towels soaked in cold water, applied to your body, especially wear circulation is easiest to affect, e.g. forehead, wrists, back of neck, under the arms, or groin.
- A cool bath or shower, or a dip in the pool may help cool you down, but only do this if there’s someone else around and you’re not too dizzy.
- This isn’t a good moment to go in the sea, no matter how refreshing it would be. You do not want to avoid heatstroke by drowning instead.
If full recovery doesn’t occur within a couple of hours, seek medical help.
Stay safe and have fun!
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