I Need New Shades!

So, here I am in one of the hottest county in Taiwan, Chunghua. Every morning I step out of my door, and there the big, bright sun blinds me from walking to school. I really need new shades! I was shopping online today, and found some cool pairs of shades from Marc Jacobs. They are quite pricey, but the celebs are wearing them too! I found this picture of Hilary Duff wearing the sunglasses I want! They look gorgeous on her, and I want them too!

Heres a little info to share:

How Sun Can Damage Your Eyes?

All light is a form of energy. When your eyes absorb light, the process creates heat or chemical reactions in eye tissue. These reactions can cause permanent damage if the eye’s natural ability to heal itself is overwhelmed.

Different parts of the eye absorb different kinds of UV radiation and light. For example:

• The surface layers of the outer part of the eyeball (the cornea and the conjunctiva) absorb UVB rays.
• The lens absorbs mainly UVA rays.
• The retina (the light-sensitive lining at the back of the inner eyeball) absorbs visible light.

If eyes are overexposed to ultraviolet radiation, the front portion of the eyes may be damaged. If visible light is too bright or intense, or if you stare directly at the sun, even briefly, the retina can be damaged, causing permanent loss of vision.

UV radiation, along with wind and drying of the eye, may cause snow blindness, an uncomfortable but temporary condition. There is some evidence that daily exposure to UV radiation in very bright sunlight over many years may increase the risk of developing cataracts. Cataracts cause a gradual clouding of the natural lens of the eye.

It Is Important To Choose The Right Pair Of Sunglasses:

Make sure the lenses are dark enough to keep your eyes comfortable, but not so dark that they reduce your vision. If you spend a lot of time outdoors in intense glare from sunlight bouncing off snow or water, you should wear sunglasses that block blue light. Medium to dark lenses with a grey, or a slightly brown or green tint, will filter out most blue light.

Most sunglasses have plastic lenses. These lenses are tougher than glass and less likely to shatter. If you buy plastic lenses, look for a pair with a scratch-resistant coating. Check the lenses for distortion by putting the sunglasses on and looking at a rectangular pattern, such as floor tiles. If the lines stay straight when you move your head up and down, and side-to-side, then the amount of distortion is acceptable.

Sunglasses are made with different kinds of lenses to meet different needs:

• Regular lenses reduce the brightness of everything evenly.
• Polarizing lenses are designed to cut glare due to reflection. This means they are good for driving and outdoor activities in the snow or on water.
• Photochromic lenses change with the intensity of UV light by turning darker when outdoors and lighter when indoors. If you wear these for driving, choose sunglasses that are fairly dark.
• “Flash” or mirror lenses reflect all or part of the light instead of absorbing it. They offer no performance advantage as they scratch easily. You should choose a pair with a scratch-resistant coating.

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