Most people find direct sunlight too bright for comfort.especially During outdoor activities, the human eye can receive more light than usual. Health care professionals recommend eye protection whenever the sun comes out to protect the eyes from ultraviolet radiation (UV) and blue light, which can cause several serious eye problems, if the eye is exposed for too long. Sunglasses have long been associated with celebrities and film actors primarily from their desire to mask their identity. Since the 1940s sunglasses have been popular as a fashion accessory, especially on the beach
There are very good reasons why people should wear sunglasses
- The pupil controls how much light reaches the light-sensitive retina in the back of the eye. In dim light, the pupil increases in size (dilates) to allow more light in. In bright light, the pupil constricts to keep too much light from striking the retina.
- In very bright conditions, the pupil cannot constrict small enough to reduce light to a comfortable level. This causes a person to squint. (Squinting reduces the space between the upper and lower lids to further reduce the amount of light entering the eye.) Muscle fatigue associated with squinting and constant constriction of the pupil can lead to headaches and eyestrain.
- Sunglasses reduce the amount of light reaching the eyes to a more comfortable level, eliminating the need for squinting and severe pupil constriction. This increases comfort and reduces the risk of headaches and eyestrain.
- Sunglasses are an effective wind barrier. Wearing sunglasses reduces the rate of evaporation of tears and helps keep your eyes moist and comfortable. Sunglasses also help keep contact lenses from drying out and prevent windblown particles from getting in your eyes and causing a corneal abrasion.
- Close-fitting, "wrap" style sport sunglasses are particularly effective at reducing the potential for dry eyes and eye injuries from windblown particles.
But there are times when you just have to leave the sunglasses in the car...
When NOT to wear sunglasses
- Wearing sunglasses indoors anywhere is almost always not appropriate, you end up looking like a blind man who has lost his walking stick. If you have a medical condition causing sensitivity to artificial lights, you may be excused from this rule. Socially, wearing your sunglasses indoors is often just plain rude. When you are trying to carry on a conversation with a person that is wearing sunglasses for no apparent reason, it can be rather distracting. While you may think that you are putting out the mystery-man vibe, you're actually just telling people you are not interested in what they have to say. If you plan to make it a habit of giving off this attitude, expect to receive the same in return.
- In a social gathering or setting, people will presumably strike up conversations with others they find interesting. It can be difficult to approach a new person and say hello. When that person is wearing dark, reflecting sunglasses, they may find themselves sitting alone watching everyone else mingle. For this circumstance, consider a shade of lens that protects your eyes and still allows your features to be seen. This will help you seem more approachable and less intimidating.
- There are other times that you may want to wear sunglasses and social acceptability does not get in your way. You will not, however, enjoy any of the benefits of sunglass protection, as these high intensity lights are much stronger than the UVA and UVB rays emitted by the sun. Any kind of welding equipment, tanning beds and eclipses all emit high intensity light for which your sunglasses are no match. Special protective eye wear is needed while working with welding equipment and while in tanning beds. Additionally, a pinhole camera is the preferred apparatus for viewing an eclipse.
When deciphering where and when to bring the sunglasses, a little common sense will go a long way.
Protect yourself from high intensity light with specialized eyewear designed for that particular activity.
Know when sunglasses are needed and when they are not. Taking a moment to consider a few factors will save you embarrassment and possibly injury later.
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