How to choose sunglasses :
If all your idea of buying sunglasses is to just try a variety of them and peek in the mirror. Have you ever thought about its ability to protect you from UV rays? durability? Vision? The shape of your face and head when you wear it? There are many factors involved that determine the right sunglasses for you, not just good shape.
1- Choose to protect your eyes first and foremost. Excessive exposure to ultraviolet radiation can cause many problems with your eyes, such as cataracts, burns and cancer.
2 - Look for glasses that block at least 99% of UVB radiation and 95% of UVA rays if you want to protect your eyes from these risks. Also look at how much coverage your glasses provide. Know how much you can see outside the frame, and whether the glasses allow the sun to enter from the top or the sides?
Would you buy these glasses for sports or to spend a long time outside the house? Choose goggles that are a good fit, and possibly elastics on the arms. Polarized is a must if you are fishing or for use in the water, because polarized sunglasses offer greater protection from the sun.
3 - Don't buy sunglasses if they are labeled "cosmetic" or don't provide any information about UV protection. Look for scratch resistance, as many lenses have very fragile coverage. You'll want to stay with you for a long time if you're going to spend a large amount. Fortunately, most types of damaged lenses can be replaced or scratches on your Oakley sunglasses repaired.
Choose a suitable shape:
1- Choose the size. Sunglasses are available in all shapes and sizes! It is good to find contrast between the shape of the face and the frame in general. Angled frames are more suitable for a round face, for example, while square frames are more suitable for a softer, round face. Here are a few popular shapes:
Glasses with a mirror layer on their surface: They are widely used by police officers in some countries and are available in the form of aviator style or rolled glasses.
Pilot's glasses: The lenses are teardrop-shaped and have a thin metal frame. Often used by pilots, military officers and lawmen in some countries, it suits any face shape but works best with an oval.
Round glasses: Popular because they were worn by John Lennon and Ozzy Osbourne, they are not very effective at blocking the light from the eyes.
Rolled glasses are associated with athletics and extreme sports.
Large and associated with models and movie stars. It is simply amazing!
2 - Choose the sunglasses model based on your face shape. We recommend matching the shape of the face with the model of glasses as follows:
Oval Face: The oval is the “perfect face shape” and can wear any type of eyeglasses. Avoid frames that look too thin or thicker than they should be. Do not choose frames that are larger than the width of your face.
Square Face: Choose round glasses to balance the features of this face due to its sharpness, prominent border and jawline. Be careful not to get too thick, but try to choose glasses that are wider than your face and avoid rectangular glasses with sharp corners.
Round face: The round face is characterized by fullness of the chin and cheeks. Choose square or ribbed sunglasses with an angled design to balance it out, and look for thicker frames.
Long Face: Choose the large lenses and ribbed frame to adjust the length of the face. Keep in mind the popular sports and vintage eyeglasses.
Flat face: Choose dark lenses and frames to accentuate the contours of the face, and lighter colors can make your expressions more vibrant.
3- Make sure the glasses are the right size. Try it and make sure it doesn't put pressure on your head. Their weight should be evenly distributed between the ears and the nose, and the eyelashes should not touch the lenses or the frame. The glasses should fit over the nose and ears, and you should adjust them if you feel they are tilted to one side. Use the scaling rule that "eyelashes are less than lenses" as well.
If the glasses are not the right size, you can go to a sunglasses store for an adjustment.
Make sure that the area of the lenses is not too small to achieve their primary purpose of blocking sunlight.
Choose your lens color wisely:
1 - Note that the color of the lenses affects not only your style, but also your ability to distinguish colors and determine contrast. Some colors enhance contrast, which may benefit you but at the cost of distinguishing between colours, which can cause problems (for example, when you are driving and need to be able to clearly distinguish the colors of a traffic light). Some sunglasses come with interchangeable lenses so you can easily change the color as you like.
Gray lenses reduce the intensity of light without affecting contrast or distorting colors.
Brown lenses enhance contrast partially by blocking some blue light which is good for snow sports. They are also generally good for hunting in bright light against an open background.
Yellow/amber lenses enhance contrast strongly because they block out most or all of the blue light, so they are preferred by hunters who benefit from contrast when looking at their targets in the sky, but they are bad for activities that require color recognition (like driving!), and good for snow sports.
Orange/red lenses are good for snow sports but only on cloudy days.If you are a hunter, the orange lenses are good for potty targets on open backgrounds.
Violet lenses are good for hunters who need to see pottery targets against a green background.
Copper sunglasses soften the sky and the grass against the golf ball.
Blue and green sunglasses enhance the contrast with the yellow tennis ball.
2 - lose noise. Hold the lenses in front of a fluorescent lamp. Check that there is no waveform when moving the sunglasses up and down. His absence would be a good sign.
Choosing the right lens material:
1 - Choose scratch-resistant lenses. Scratched sunglasses are useless. Polyurethane lenses are pressure-resistant, flexible, light, and have great optical clarity, but are expensive.
Glass is heavier, more expensive, and will branch if broken.
Polycarbonate is not as scratch-resistant as polyurethane and its optical clarity is lower than glass, but it is more affordable.
Polyamide is a less commonly used material and its optical clarity is like glass without the risk of breakage.
There are significant differences in the resistance of polycarbonate lenses depending on the finish during manufacture.
Acrylic is also reasonably priced, but it is less durable and clear, weak in heat and often deforms. Glass or resin are the best choices.
Helpful ideas:
Round frames are great with a square face, while rectangular frames are great with a heart-shaped face and square frames are great for a round face.
Try to choose dark lenses if you have small eyes because they increase the size of the eyes.
Check the lens's smoothness (no scratches, bubbles or smudges) before purchasing it.
Make sure the sunglasses are the right size, or they will fall off your face. Be aware of your surroundings when playing different sports as you may fly by mistake.
Always put your sunglasses in a sturdy cover to protect them while you're on the move, or you could sit on them and break them.
Make sure to choose a good shape that makes the glasses feel comfortable on your face. You won't want sunglasses that are too big, too small, or that look good but uncomfortable.
Always make sure that the color of the lenses is dark enough.
Light-colored, white or pink-framed sunglasses stand out against darker skin.
Keep your sunglasses in a safe place when you're not wearing them to avoid scratching the lenses.
Warnings:
Wearing cosmetic glasses stimulates eye damage. Dark lenses reduce the light available to the eyes, causing the pupils to dilate. Sunglasses do not block harmful UVA and UVB rays, so they easily penetrate the eye through the dilated pupils. Do not wear dark lenses unless they block UVA and UVB radiation.
Photochromic lenses (which change according to lighting conditions) do not perform well in warm (for example, they become darker in cold weather than in warm). It also does not work in the car at all, because it becomes dark with exposure to ultraviolet rays and the windshield of the car blocks these radiation.
Polarized lenses reduce glare but may react to darker colors in car windshields, creating blind spots and reducing the ability to see the LCD readings.