Eyes, just like the rest of your body need physical activity to maintain health, prevent from deterioration, and to overcome damage that may have already taken place.
Your eyes are the direct visual link to the world around you. They let you see the beauty of nature, the sadness of strife and the joys on the faces of beloved. Natural healthy eyes are constantly on the move searching and scanning to keep us aware of pleasures and dangers.
However, today's modern indoor lifestyle of reading, television, and computers, forces our eyes to unnaturally strain to adjust focus and not move freely as they should. This is known as near point stress and may result in headaches, eyestrain and reduced vision.

Frankly, I have near-straightedness and a little astigmatism when I was a little girl, that’s because of my incorrect learning and living habits. I couldn’t see what’s on the blackboard and my grades began to fall down. My father took me to see an eye-doctor and he prescribed some medicine and asked me to do some exercise to release eyestrain every two hours in my school. I took his advice and do what he told me every day. Although my visual acuity didn’t seem to ascend and I had to wear glasses, my vision never falls down again. This is what I have experienced so I agree with researches which show that some effective exercise has great impact on your eyes health. You can do what you like as long as your eyes feel released, even if you only close your eyes and do nothing.

Here’s an easy exercise: eye rotations.
Pretend your eyes are going around a clock. Look at a spot straight ahead, then look straight up to an imaginary 12 o'clock position and hold for two to three seconds and then look at a spot straight ahead. Then look towards the 1 o'clock position and hold for two or three seconds then look straight ahead again. Continue looking straight ahead and then look towards the 2 o'clock, the 3 o'clock, and other numbers on the imaginary clock. After you have gone "around" the clock clockwise, then go counter-clockwise and repeat.Also try to go around the clock with your eyes closed.

There are many more eye exercises you can do, but these exercises will start your eyes moving again and ultimately result in strong healthy eyes. Whether you are wearing eyeglasses with nearsighted, farsighted, suffer from astigmatism, or declining vision as you age, eye exercises can benefit you much.

Sunglasses in the summer are like gloves in the winter, a must-have (that you’ll probably end up losing). This season, there's such a huge selection of sunglasses styles, prices and features that sometimes it's hard to decide which pair is the best. Finding a pair of sunglasses you love is easier if you start thinking about your possible choices now, before you go shopping. Then what should you look for in a pair of sunglasses? Three big things: good eye protection, comfort and a fantastic style.

UV protection

Ultraviolet (UV) rays from the sun can damage your eyes by contributing to cataracts, macular degeneration and growths on the eye, including cancer. All of the sunglasses offered at REI block 100% of UV light.

• UVB rays are the main concern for eyes. According to the American Academy of Ophthalmology, "Long-term exposure to ultraviolet (UV) radiation in sunlight is linked to eye disease. UVB radiation is considered more dangerous to eyes and skin than UVA radiation."
• UVA rays are the primary ones absorbed by your eyes. While they pose far less concern than UVB, doctors still recommend that they be avoided.
• UVC rays are not a concern, as they are blocked by the atmosphere.

So your sunglasses must provide protection from ultraviolet radiation. The FDA, the government agency that oversees sunglass manufacture and sales in the U.S., recommends you look for sunglasses with lenses that block 99-100% of UVA and UVB radiation. The label should read either UV 400 or 100% UV protection.

Sunglasses lens materials

Sunglasses lens materials differ quite a bit. Some area is heavier than others and some types are more durable. Three materials are commonly used for sunglass lenses:

• Polycarbonate, a durable lightweight plastic.
• CR-39, a plastic used mostly in prescription-grade lenses.
• Glass, durable but much heavier to wear.

Sunglass lens tints

Colors are applied to sunglass lenses to help absorb light as it passes through them. The color you choose is a matter of personal taste, but what you should consider is:

• Gray lens tints reduce brightness, but do not distort color.
• Brown and amber tints reduce glare, including the glare created by the blue frequency in sunlight, which can make things appear hazy. Brown and amber tints distort colors more than gray tints do.
• Yellow lens tints reduce the haze from blue light better than browns, so they really sharpen up the view, but they cause more color distortion.
• Green tinted lenses reduce glare and help filter out some of the blue light. They provide good contrast between objects.
• Rose colored lenses might be a good choice if you participate in water sports or other outdoor activities, because they provide good contrast for objects viewed against blue or green backgrounds.

Glasses Styles

About the glasses style, I have mentioned it in my last article, go and have a look.

Eyeglass frames can truly enhance one’s appearance. Upswept shapes can literally add lift to a face. Color can be used to add attention. Smaller frames are still the most popular among people, especially the young. When choosing a frame, remember it is to accent you, not take over. Today’s materials allow for beautiful color. There is anodized titanium which is thin, light- weight and delicately beautiful. Many of the rimless designs are made out of these materials. The small bits of metal join unframed lenses creating an almost not-there look, which is extremely popular today. The rimless style or three-piece mount as it is called also allows you to shine through. These frameless styles offer every shape imaginable.

If your face is round, you need a rectangular frame to counter balance the roundness. If you have an oval face, any shape like upsweep, oval, round or rectangle is appropriate. Square faces look better with soft shapes. If your chin is very pointy an eyeglass frame can balance that out. Plastic frames are popular for women today. Plastics offer everything from a bright red little cat eye to a heavy tortoise shell rectangle. Many of the frame designers use laminates that allow layering of color for an extremely bold and rich look. Eyewear needs to be considered within the context in which one wears it. There are dressy delicate metal frames. Some designers even add small jewels to the frame. Eyewear follows the trends in fashion. Today you can wear what looks best on you whether it be almost invisible, heavy plastic, small, large and jeweled with upswept temples. Just remember; if it isn’t appropriate to your prescription choose something else. With the myriad of styles available today and with the help of your optician, you will find the most appropriate eyeglass frame for your prescription and face shape.

Eye is such a sense organ which requires continuous monitoring and care for working properly for years, therefore taking the utmost care of this body organ is imperative. Purchasing right quality of eye care products is one of the best methods of taking care of eyes, which is one of the most precious gifts to human by God. Although, market is flourished by numerous eye care products yet prescription glasses is surely going to be one of the best gifts which are used to take care of the eyes in the most desired manner.

Prescription glasses are basically powered glasses that are recommended by doctors only after proper eye check up. These glasses largely help in rectifying faulty visions. It is best to pick up a pair as soon as you experience flawed vision, but only at the recommendation of your ophthalmologist or optometrist as only he/she would be able to configure your exact power and kind.

Prescription glasses comprise of trendy frames well-fitted with best quality of single, bifocal, progressive light and thin prescription lenses, etc. These prescription glasses are made from both glasses and plastics. Obtainable in the various eye-catching designs, shapes, colors, these glasses serve for numerous years if handle with care.

Glass lenses, for use as magnifiers or for starting fires, date to about 300 BC, but the first eyeglasses to aid or correct vision were almost certainly invented in 1280 in Florence, Italy by the Dominican friar Alessandro della Spina and his friend, the physicist Salvino degli Armati.   Prescribed for far-sightedness, the glasses had convex lenses and were worn by Armati, who had injured his eyes while performing light refraction experiments and discovered that it was possible to enlarge the appearance of objects by looking through two pieces of convex glass.

It was in the early fourteenth century that concave lenses were used to correct near-sightedness.  In fact, Pope Leo X  was depicted wearing glasses, with concave lenses, in a 1517 painting by Raphael.  Whereas early eyeglasses were made of polished quartz, by the sixteenth century developments in glassmaking made it possible to mass produce them from glass.

Bifocals, the combination of both concave and convex lenses for both types of vision correction, a top lens for distant viewing and a lower lens for reading, were developed around 1760 by the American statesman and inventor Benjamin Franklin. In 1784, Ben Franklin developed bifocal glasses. He was getting old and was having trouble seeing both up-close and at a distance. Getting tired of switching between two types of glasses, he devised a way to have both types of lenses fit into the frame. The distance lens was placed at the top and the the up-close lens was placed at the bottom.

Many people find direct sunlight too bright to be comfortable. During outdoor activities, the human eye can receive more light than usual. Healthcare professionals recommend eye protection whenever outside to protect the eyes from ultraviolet radiation, which can lead to the development of a cataract. Sunglasses have long been associated with celebrities and film actors primarily from a desire to hide or mask their identity. Since the 1940s sunglasses have been popular as a fashion accessory, especially on the beach.

It is said that the Roman emperor Nero liked to watch gladiator fights with emeralds. These, however, appear to have worked rather like mirrors. Flat panes of smoky quartz which offered no corrective powers but did protect the eyes from glare were used in China in the 12th century or possibly earlier. Contemporary documents describe the use of such crystals by judges in Chinese courts to conceal their facial expressions while questioning witnesses.

In the early 1900s, the use of sunglasses started to become more widespread, especially among the pioneering stars of silent movies. It is commonly believed that this was to avoid recognition by fans, but the real reason was they often had perennially red eyes from the powerful arc lamps that were needed due to the extremely slow speed film stocks used. The stereotype persisted long after improvements in film quality and the introduction of ultraviolet filters had eliminated this problem. Inexpensive mass-produced sunglasses were introduced to America by Sam Foster in 1929. Foster found a ready market on the beaches of Atlantic City, New Jersey, where he began selling sunglasses under the name Foster Grant from a Woolworth on the Boardwalk.

Sunglasses first became polarized in 1936, when Edwin H. Land began experimenting with making lenses with his patented Polaroid filter. Since then, polarized lenses have evolved, whereby new substrates and lens technology processes offer consumers better clarity, protection and comfort. Sunglasses can improve visual comfort and visual clarity by protecting the eye from glare. Various types of disposable sunglasses are dispensed to patients after receiving mydriatic eye drops during eye examinations. The lenses of the polarized sunglasses contain polarized filters which reduce glare reflected off shiny surfaces such as water. They are also popular among fishermen because they allow wearers to see into water when normally glare or reflected light would be seen.