The sun is indispensable to all life on our planet, but its life-giving rays can place us at great risk. The primary
danger is in the form of ultraviolet (UV) radiation. Apart from the sun, UV radiation is also given off by artificial sources such as welding machines,
tanning beds and lasers.
Most people are aware of the damage UV radiation can do to the skin, but few realize that UV radiation can harm the eyes or that other elements of solar radiation also affect vision.
Quality sunglasses that offer UV protection can provide additional safety and may guard against developing vision problems caused by harmful radiation.
Contrary to popular belief, sunglasses aren’t only intended for fashion and comfort. They block UV radiation, protect eyes from sunburn, and help prevent cataracts. There are several other medical benefits to wearing sunglasses depending on the medical condition, here is a list of some medical benefits to wearing certain types of sunglasses.
First and foremost, many sunglasses today come with UV protection to shield the wearer’s eyes from harmful UV rays of the sun. UV rays can provoke cataracts, cornea damage, and many other harmful effects to the eye. Today the science of UV protective sunglasses is near perfect, with many brands offering 100% protection from UVA and UVB rays.
Intense sunlight can cause migraine, tension, and other types of headaches. This can be caused by bright sunlight evoking eyestrain, UV rays from the sun damaging the cornea, and other headache-inducing effects of sunlight. By wearing sunglasses under bright conditions, headaches can be reduced and in some cases even prevented.
By blocking the sun’s light and heat, sunglasses can help keep the eyes moist by lessening the evaporation of tears. The eyes need moisture to focus and perform correctly, so proper sunglasses can actually improve vision under intensive sunlight.
Medication-induced Photo sensitivity is an abnormal sensitiveness to natural or unnatural light as a result of a side effect from a prescribed medication. Antibiotics and anti-inflammatory drugs have been known to cause photo sensitivity. When this happens, normal light conditions become overbearing and irritable, and can induce headaches, pain, and other symptoms. Wearing sunglasses can reduce the side effects of medication-induced Photo sensitivity by subduing the light that enters the eye.
Jet lag is the disruption of one's biological rhythms due to plane travel through different time zones. This effect is related to human biology , not psychology like many may assume. Sunglasses are effective in preventing jet lag by tricking the human body in believing that it has not passed through a different time zone. This works by reducing the sunlight that enters the eye and blurring the body's awareness of time change.
Like photo sensitivity, Photophobia is an acute sensitivity to normal light conditions, only Photophobia is not induced by medications. It is usually a symptom of another disease or infection. Patients who have Photophobia typically experience moderate discomfort to severe pain in average light situations. Sunglasses ease the pain and discomfort caused by Photophobia by lessening the amount of sunlight that reaches the eyes.
Polarized sunglasses are sunglasses that help diminish the glare of the sun. Polarized sunglasses provide incredibly clear, glare-free vision. These glasses were first worn by pilots to help them see when the sun was shining in different spots during the day. These days, many people wear polarized sunglasses when driving, golfing, and fishing. They look the same of other types of sunglasses, but deflect the sunlight in such a way so that it is not distracting when they are focusing on other things. This causes the dramatic reduction in glare and increases visibility.
For those who drive a great deal during the day, these sunglasses will help keep the sun from becoming too distracting and help prevent squinting. People seem to get less tired, suffer less fatigue, and have fewer headaches on long trips. Polarized sunglasses can make driving safer and improve outdoor sports activities.
Light reflected from surfaces like a flat road or smooth water is generally horizontally polarized. This horizontally polarized light is blocked by the vertically oriented polarizers in the lenses. The result: a reduction in annoying and sometimes dangerous glare.
Certain lens materials can be darkened and provide limitless colour options