Sight is, arguably, our most important sense. More of the brain is dedicated to vision than to hearing, taste, touch, and smell combined. In this article, we explain the anatomy of our eyes and how they let us see. Vision is an incredibly complex process that works so well, we never need to give it much thought. The work of the visual system can be summarized as follows: light enters our pupil and is focused onto the retina at the back of the eye. The retina converts the light signal into electrical impulses. The optic nerve then carries the impulses to the brain where the signals are processed. To understand how this amazing feat occurs, we will start with a glimpse at the anatomy of the eye. The tissues of the eye can be split into three types: refracting tissues that focus light light-sensitive tissues support tissues We will look at each of these in turn. Refracting tissues Refracting tissues focus incoming light onto the light-sensitive tissues, to give us a clear, sharp image. … [Read more...] about An introduction to eyes and how they work
How eyes work
From purplish-brown acne scars to whiteheads to red splotchiness to bluish-grey under-eye circles, if it wasn’t, you know, my actual face, I might appreciate my Monet-like mosaic complexion. But alas, it's safe to say that my skin is regularly in need of improvement. And while the cosmetic chemists who concocted my Nars concealer might as well be gods in my book, makeup is (and always has been) a temporary fix for covering up acne-ridden or dull, tired skin. It's when I wash off my layers of foundation, blush, bronzer, and concealer at the end of the day that the extent of my exhaustion reveals itself. While I’ve tried sheet masks and multi-step Korean skin-care regimens to some degree of success (even if it was momentary), they’ve done little to detract from my puffy, dark eyes. So when I gained wind of under-eye pads, which are pegged as essentially sheet masks for the eye area, I was intrigued.“Under-eye pads are designed to help with the most common … [Read more...] about ‘I Tried 3 Different Under-Eye Masks—Here’s How They Worked’
Working night shifts disrupts the body's circadian rhythm, which a number of studies have found may raise the risk of cancer development. Now, researchers have shed light on the mechanisms behind this association. Scientists from the Massachusetts Institute of Technology (MIT) reveal that disruption to the circadian rhythm also leads to the impairment of two tumor suppressor genes, which can spur tumor growth. Lead author Thales Papagiannakopoulos, of MIT's Koch Institute for Integrative Cancer Research, and colleagues publish their findings in the journal Cell Metabolism. Around 15 million people in the United States work night shifts or other irregular schedules, which studies have shown may have negative implications for health. A study reported by Medical News Today last year, for example, found a link between rotating night shift work and increased risk of death from cardiovascular disease, lung cancer, and all causes. Shift work interferes with the body's circadian … [Read more...] about How night shifts can increase cancer risk
Credit: iStock.com/memoriesarecaptured High blood pressure, also called hypertension, is a major risk factor for heart disease. It has several causes including smoking, alcohol, caffeine, obesity, inactivity, emotional stress, heavy metal poisoning, birth control pills, and a diet high in sugar, fat, and salt. But, does Benadryl raise blood pressure? Doctors define high blood pressure as a systolic reading over 140 mmHg (millimeter of mercury) and a diastolic reading of 90 mmHg and above. The systole causes the heart to contract, whereas the diastole allows for relaxation between heartbeats. Normal blood pressure is a systolic reading between 120 to 129 mmHg and diastolic of 80 to 85 mmHg. One in three Americans suffer from high blood pressure or 75 million people. Only half of those actually manage their hypertension properly. This may be because certain drugs like the antihistamine Benadryl will increase your blood pressure, and this is a problem for those taking … [Read more...] about How Does Benadryl Raise Blood Pressure?
Cayenne pepper is quite well-known for its zesty flavor. But do you also know about cayenne pepper cleansing properties? Cayenne pepper belongs to the capsicum annum family and is closely related to bell peppers, jalapeños, paprika, and other types of pepper. Cayenne pepper has a biting, spicy taste and is mostly used to spice up a dish. It is either used in its natural form, or a dried and powdered form. The spicy, hot taste of cayenne pepper comes from the chemical compound called capsaicin. In addition to providing the characteristic spiciness to cayenne pepper, this active compound has interesting properties that are beneficial to health. The capsaicin ingredient in cayenne pepper has stimulating properties. Cayenne pepper is usually mixed with other herbal concoctions for more effective results. The capsaicin in cayenne pepper acts as a catalyst that stimulates herbal properties, making them work more efficiently and effectively. In the cayenne pepper cleansing … [Read more...] about Cayenne Pepper Cleansing: Health Benefits and How It Works
Normally, your immune system fights germs. It is your body’s first defense. Allergy occurs when a person’s immune system reacts to substances in the environment that are harmless for most people. Approximately 50 million Americans suffer from allergic conditions such as hay fever or asthma that negatively impact their quality of life. What is Perilla ? Perilla is a herb that has been historically used in traditional Chinese medicine to reduce the symptoms of allergy. This mostly unknown herb, Perilla frutescens, is part of the mint family. Sometimes just called perilla, an extract from the plant’s leaves have been found in many studies to be effective for the treatment of allergies. How perilla works ? The rosmarinic acid content of perilla helps reduce seasonal allergic rhinoconjunctivitis symptoms such as itchy nose, sunstroke, muscle spasms, allergic rhinoconjunctivitis and itchy and watery eyes by suppressing allergic immunoglobulin responses … [Read more...] about Perilla – Natural Anti-Allergy Oil And How It Works?
If you have listened to any media outlet in the last few weeks, you would be well aware of the measles outbreak that occurred at Disneyland. We have been told that we should all be scared of this deadly disease, and should immediately rush to the doctor to get our shots, in panic. However, rewind 50 years, and measles was viewed in a far different light, considered to be simply a relatively benign disease that was just part of childhood. In fact, parents used to hold ‘measle parties’, where their children would be exposed to other children with the illness, in order to catch it while they were young. This way, it would be likely to be less serious than if it were caught as an adult. Our grandparents’ generation learnt ways of coping with this illness that effectively shortened its severity and length by doing a few natural steps. Measles is a highly-contagious viral illness that causes a fever along with a skin rash. Occasionally it can lead to serious … [Read more...] about How to immunize against measles, without vaccinations…
Human beings receive more than 90 percent of their information through the eyes. The trend towards natural health to deal with today’s ailments is garnering increased attention in the western world. Improving your eyesight naturally is possible if you experience myopia, hyperopia or have an astigmatism. Before we dive into natural therapies for eye care improvement we will outline the most common vision problems affecting people today. How the Eye Works A quick anatomy lesson for those of you non doctors out there, the surface of the eye is called the cornea and behind it is the lens that focuses light. The aqueous humour is the transparent gel like substance that gives the eye its shape. The retina focuses information from the optical nerve to your brain enabling you to see. Myopia Nearsightedness or the correct medical term myopia is the most common ailment affecting people with poor vision. The cause of nearsightedness is when the eyeball is more elongated than round, or … [Read more...] about Improve Your Eyes Naturally
Hello, Ladies! I’ve been searching long and hard for homemade mascara that actually works, and it’s been more difficult than I had imagined. But as my mom always says, where there’s a will, there’s a way; and by golly we have found a way! I say “we” because the idea came from a friend of mine, as we were relaxing on the couch discussing natural cosmetic alternatives. I told her about the wall I’d hit when it came to mascara, and how I desperately wanted to bring something to my readers, and myself, that was a quality replacement to Covergirl chemicals. We talked, and all the sudden a lightning bolt of genius struck my dear friend and she said “What about egg?” EGG! Why didn’t I think of that?! It made sense, because egg yolk has so many nurturing and conditioning properties that have been used to strengthen, soften, and even help lengthen hair. The next day I went to work with my tiny bowls and spoons: separating, … [Read more...] about DIY All Natural Mascara That Actually Works! Plus 5 Other Homemade Mascara Reviews
A few sociopaths achieve great notoriety, but most live their lives as unknowns. Some estimates suggest 4% of adults are sociopathic, anonymously living without a conscience. This does not mean they are serial killers. They might not want that kind of heat or be interested in killing at all. They choose to exercise their lack of conscience in other ways, all of which are damaging to other people. If you have ever had a run-in with a sociopath, you will never forget it. Besides being in shock that someone would treat you that way, it is downright confusing. Most people have learned to expect a degree of human regard from others. When you get NONE of that, you tend to get confused. There are several theories on how sociopaths are created. Some claim it involves a simple matter of genetics. Others credit severe childhood trauma or frontal lobe damage. Still others argue a complex relationship between nature and nurture. Here, I’d like to present another option. In this article … [Read more...] about How easy is it to become a sociopath? Check out this scenario