Why Buy Polarized Sunglasses?

The sun is shining and all signs point to spring – finally – being on its way. However, this time of year also comes with challenges. Skies clear of the haze or pollen of summer make for brighter-seeming days. Snow on the ground reflects sunlight, increasing glare. Likewise, rising temperatures cause snow to melt, making roads wet and reflective as well.

208a16_6631138cb3b14c68a9649d867eddf8e8.jpg

To combat these, you could always just stay indoors, or only go outside on rainy days. But let’s suppose you want to get out and enjoy the feeling of the sun on your skin for the first time in a few months. In that case, a pair of sunglasses are your best bet.

So, you’re looking to buy a new pair of sunglasses. That is an excellent decision. Not only do quality sunglasses have a range of health benefits, from helping to prevent cancer to helping to promoting eye health, the right pair can complete the look you’re going for.

If you’ve ever gone shopping for sunglasses, you know that you are bombarded by choices. Choices in make, frame style, lens shape, lens color and hue, choices in mirroring… There is a lot of thought involved in picking out the right shades.

Once you’ve waded through all that, many quality sunglasses manufacturers offer you one final choice: Polarized or Unpolarized?

Generally, polarized sunglasses are more expensive than unpolarized. So that begs the question, are they worth it? To make that choice, and answer that question, you should know what polarized sunglasses are, what they do, and why you should wear them.

What Are Polarized Sunglasses?

Simply put, polarized sunglasses are sunglasses with a clear coating that acts to reduce glare.

They were first used by people who spent their time on or near the water. Polarized sunglasses helped boaters see through the water to locate potential hazards and fisherman see the fish they were trying to catch. Likewise, by reducing the glare off the water, polarized sunglasses help both to see across the water.

How Do Polarized Sunglasses Do What They Do?

We’ve already established that polarized sunglasses reduce glare, but how do they do what normal (and less expensive) tinted glasses can’t?

The answer to that is in how light behaves. Don’t worry, we won’t get bogged down in the science. Continue reading Why Buy Polarized Sunglasses?

Advertisements

Eye Care Tips for Bloggers and Internet Users

Health is something which we can’t ignore from the moment we start breathing and we have already shared some awesome health tips and mind and soul enhancement tips for betterment of  our life. Today, in particular I’m going to talk about Eyecare as Eyes are one of the most important part of our 5 senses.

Blog-Writing.jpg

As a Blogger or even a normal Internet users, our eyes are used the most. Working on laptop or computer for hours will start creating lots of eye related issues like Dry eyes, tearing, allergies and many more. Before I start giving you eye care tips, I would suggest you to look into this presentation which demonstrates some of the common eye related problems.

Top 10 Eye Related ProblemsResponsive-Daily-Blogger-Template.jpg

In today’s world of technology, blogging has become an addiction to many people. People are so involved in their blogging that even they are neglecting their own health. So I decided to write a post on eye care tips because this is one of the most common problems faced by Bloggers who spends hours of day sitting in front of computer. We have already informed you about Pro-blogging stress and solution.

This is not only for Bloggers but also any one who spends lots of time in front of computer, television. Here are some important tips and suggestions to take care of your eyes.

Useful Eye Care tips for Bloggers and Computer users:

1) Take a break – in between your work have small breaks eespecially if you are working for long hours which help you in reducing strain on your eyes and increases blood supply to your body. Continue reading Eye Care Tips for Bloggers and Internet Users

How Do I Soothe My Dry Eyes?

www.healthpost.asia_dryeye.jpgPhoto by www.healthpost.asia

Dr. Michelle Calder-Cardwell is the owner and lead optometrist at
Urban Optiques Vision & Eyewear in Northville, MI.

Q. Lately my eyes have become dry and scratchy feeling when I blink. How can I soothe my irritated eyes?

A. Every time you blink, your healthy eyes get a bath from a fluid that’s a combination of oil, water, and mucus. This fluid, or tears, helps protect and moisturize the eyes. When something irritates your eyes or interferes with the production of tears, it can result in irritated dry eyes that are vulnerable to corneal abrasions.

Dry eyes are actually very common. More than 20 million Americans suffer from this annoying and sometimes painful condition. If you think you have dry eyes, check out some of these common symptoms and possible causes. Once you understand the culprit, you can begin to make changes to relieve your burning eyes, once and for all.

lavishtrend.com_dryeye
Photo by lavishtrend.com

Symptoms of Dry Eyes:

Continue reading How Do I Soothe My Dry Eyes?

A better understanding of bananas could help prevent blindness

Bananas (stock image) | Credit: © yurakp / Fotolia

Carotenoids, which are found at various levels in different banana cultivars, are important vitamin precursors for eye health. In a study published in ACS’ Journal of Agricultural and Food Chemistry, researchers report a new understanding of how the fruit makes and stores the compound. Their findings could someday help in the development of banana varieties with enhanced health benefits.

Vitamin A deficiency is rampant in Africa and Southeast Asia, causing an estimated 250,000 to 500,000 children to become permanently blind each year, the researchers note. Even worse, half of those children die within a year of losing their sight. To combat vitamin A deficiency, other researchers have been investigating methods to boost carotenoids in bananas, because these compounds–which turn fruits and vegetables red, Continue reading A better understanding of bananas could help prevent blindness

Blue Light: Bad for Your Eyes?

On this page: What is blue light?Seven key points about blue lightBlue light filters and protective eyewear

Visible light is much more complex than you might think.Stepping outdoors into sunlight; flipping on a wall switch indoors; turning on your computer, phone or other digital device — all of these things result in your eyes being exposed to a variety of visible (and sometimes invisible) light rays that can have a range of effects.

Most people are aware that sunlight contains visible light rays and also invisible ultraviolet rays that can tan or burn the skin. But what many don’t know is that the visible light emitted by the sun comprises a range of different-colored light rays that contain different amounts of energy.

iStock_000075345779_XXXLarge.jpgShared by www.opticianonline.net 

What Is Blue Light?

Sunlight contains red, orange, yellow, green and blue light rays and many shades of each of these colors, depending on the energy and wavelength of the individual rays (also called electromagnetic radiation). Combined, this spectrum of colored light rays creates what we call “white light” or sunlight.

THE LIGHT SPECTRUM

 

Without getting into complicated physics, there is an inverse relationship between the wavelength of light rays and the amount of energy they contain. Light rays that have relatively long wavelengths contain less energy, and those with short wavelengths have more energy.

Rays on the red end of the visible light spectrum have longer wavelengths and, therefore, less energy. Rays on the blue end of the spectrum have shorter wavelengths and more energy.

The electromagnetic rays just beyond the red end of the visible light spectrum are called infrared — they are warming, but invisible. (The “warming lamps” you see keeping food warm at your local eatery emit infrared radiation. But these lamps also emit visible red light so people know they are on! The same is true for other types of heat lamps.)

On the other end of the visible light spectrum, blue light rays with the shortest wavelengths (and highest energy) are sometimes called blue-violet or violet light. This is why the invisible electromagnetic rays just beyond the visible light spectrum are called ultraviolet (UV) radiation.

UV rays have higher energy than visible light rays, which makes them capable of producing changes in the skin that create a suntan. In fact, the bulbs in tanning booths emit a controlled amount of UV radiation specifically for this reason.

But too much exposure to UV causes a painful sunburn — and even worse, can lead to skin cancer. These rays also can cause sunburned eyes — a condition called photokeratitis or snow blindness.

But ultraviolet radiation, in moderation, also has beneficial effects, such as helping the body manufacture adequate amounts of vitamin D.

Blue light contributes to digital eye strain; computer glasses that block blue light may increase comfort.

Generally, scientists say the visible light spectrum comprises electromagnetic radiation with wavelengths ranging from 380 nanometers (nm) on the blue end of the spectrum to about 700 nm on the red end. (By the way, a nanometer is one billionth of a meter — that’s 0.000000001 meter!)

Blue light generally is defined as visible light ranging from 380 to 500 nm. Blue light sometimes is further broken down into blue-violet light (roughly 380 to 450 nm) and blue-turquoise light (roughly 450 to 500 nm).

So approximately one-third of all visible light is considered high-energy visible (HEV) or “blue” light.

Key Points About Blue Light

Like ultraviolet radiation, visible blue light — the portion of the visible light spectrum with the shortest wavelengths and highest energy — has both benefits and dangers. Here are important things you should know about blue light:

Little girl using a tablet computer
1. Blue light is everywhere.
Continue reading Blue Light: Bad for Your Eyes?

9 Tips On How To Buy Prescription Glasses

How do you buy the right pair of prescription glasses for your needs?
Common issues people face are glasses are:

  1. Expense – Prescription glasses can cost hundreds of dollars
  2. Time – Finding the perfect pair at a fair price can take a lot of time, especially if you shop around for a particular style at a great price.
  3. Confusion – What’s the right style for your face shape and profession? Do you need the add-ons and do you need multiple pairs?

My goal is to help clear up the process of buying prescription eye-glasses.

<Below are 9 tips on how to buy prescription glasses effectively>

1. Have An Up-To-Date Eyewear Prescription

eye-test-.jpg

The standard validity of a prescription is 2 years for adults and 1 year if you are younger. If your prescription is outdated, visit your local optical shop to get a new one.

When you get your eyesight examined, the optometrist must give you a copy of the prescription whether or not you ask for it.

Here are some abbreviations and terms listed on your prescription you’ll need to be aware of when ordering glasses online:

  • OD (Oculus Dexter) refers to your right eye.
  • OS (Oculus Sinister) refers to your left eye.
  • Sphere (SPH) indicates the amount of lens power, prescribed to correct nearsightedness (-) or farsightedness(+).
  • ADD (for bifocals) is the added magnifying power applied to the bottom part of multifocal lenses to correct presbyopia.
  • Cylinder (CYL) indicates the amount of lens power for astigmatism.
  • Axis describes the positioning of the cylindrical power on your lenses (required for astigmatism).
    <Note: you will not be able to use a contact lens prescription – the two are different.>

2. Measure Your Pupillary Distance

Pupillary-Distance-e1444667186165.jpg

Pupillary Distance (PD) is the distance between your pupils – usually measured in millimeters.

The optical center of the lenses gives you the truest vision. This part of the eyeglasses should be directly in front of your pupils.

To get the correct positioning of the lenses on your eyeglasses, the eyeglasses lab needs your PD. Pupillary distance generally falls between 54 and 68 mm.It can be tricky to measure your own PD. It is best to have it measured by a skilled optician.

Optometrists will note this measurement during your eye examination but may omit the PD from your prescription because it gives consumers the ability to shop online. Ask them to write this number in your prescription, if they haven’t already. Continue reading 9 Tips On How To Buy Prescription Glasses

Baby’s Eyes Care !

Your baby’s eyes need to be gently cleaned with a cloth every day.
The best way to do this, is to:

  • Wash your hands before you begin.
  • Soak a cotton ball in water. Squeeze gently.
  • Clean the eye, by gently wiping the cotton ball from the inside corner to the outside corner.
  • Use a different clean, moist cotton ball for each eye to avoid potential cross-infection.
  • Some babies don’t like to have their eyes cleaned. Do make sure that the water is comfortably warm but beyond that, it’s usually best to just clean quickly and move on.

Continue reading Baby’s Eyes Care !