The newsLINK Group - UV Safety

Editorial Library Category: Health Topics: UV Safety Title: UV Safety Author: newsLINK Staff Synopsis: UV light is important in moderation. For example, someone who does not have at least some daily exposure to natural light will sometimes have a problem maintaining normal cycles of sleeping and being awake. Editorial: UV Safety 4064 South Highland Drive, Millcreek, Utah 84124 │ thenewslinkgroup.com │ (v) 801.676.9722 │ (tf) 855.747.4003 │ (f) 801.742.5803 Editorial Library | © The newsLINK Group LLC 1 UV light is important in moderation. For example, someone who does not have at least some daily exposure to natural light will sometimes have a problem maintaining normal cycles of sleeping and being awake. However, too much exposure to UV light can have a definite negative effect on vision: Possible eye diseases that might result include cancer, cataracts, and growths on the eye such as pinguecula and pterygia. Strong exposure from UV light reflecting off snow can cause snow blindness. People can also experience solar retinopathy as a result of eye exposure to a too-bright light, such as the sun, arc welding, or the operating microscope during eye surgery. The risk of developing cataracts and eye cancers is a cumulative one. As a result, it is important for people to protect themselves by wearing hats and sunglasses when outside. That goes for everyone from babies to the elderly, and it is not limited just to the summer. Damage to the eyes can occur year-round, and the sun’s UV rays can pass through thin clouds and haze. Cancer The eye can be classified as having three parts: The eyeball (or globe) is filled with vitreous humor and consists of three specific layers: the sclera, the uvea, and the retina. The uvea, in turn, also has three parts: the iris; the choroid, a thin, pigmented layer that lines the eyeball and nourishes the front of the eye and the retina with blood; and the ciliary body, which has muscles to change the shape of the eye’s lens and also cells to make the eye’s aqueous humor. The retina is only a thin layer of specialized nerve cells that connect to the optic nerve. The orbit consists of muscles and nerves. The muscles control movement of the eye in different directions. The nerves are attached to the eye. The adnexal structures consist of the eyelids and the tear glands. Cancers can develop in all three parts of the eye, and are named accordingly: Any cancer that affects the eyeball is called an intraocular cancer. The middle layer, the uvea, is the part that is most susceptible to cancer. For example, ocular melanoma grows in the uvea because it includes the cells that determine eye color. The cells that determine eye color, just like the cells in your skin that determine skin color, are susceptible to cancer. Cancers in the orbital tissues are orbital cancers. Cancers in the adnexal structures are called adnexal cancers. Cancer in the eye is categorized as to whether it started in the eye (a primary intraocular cancer) or somewhere else (a secondary intraocular cancer). Secondary intraocular cancers are more common than primary ones. For example, breast and lung cancers sometimes spread to the uvea. Of the primary intraocular cancers, the most common one is intraocular melanoma. However, even though it is the most common, it is still rare. Skin melanoma is much more common. Intraocular melanomas generally involve two kinds of cells, spindle cells and epithelioid cells. Tumors involving spindle cells are better than tumors involving epithelioid cells, since epithelioid cell tumors are more likely to metastasize to, say, the liver. Most people realize they need to see a doctor regularly in order to screen for cancer. What they may not realize is that the eye doctor can screen for cancer as well. A routine eye exam can be one key to detecting cancer that involves the eye; this kind of screening is particularly important because eye melanoma in the early stages does not cause signs or symptoms. Once symptoms do occur, the symptoms might include one or more of the following:

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