While they are a great accessory, sunglasses offer a much bigger purpose than that. Sunglasses are quite necessary for the outdoors, especially during the summers. In a 2012 survey, about 90 percent people said they believed in protecting their eyes; yet many people do not wear eyeglasses in the outdoors, or at most for cutting down the glare of the sun. As any expert like Eye specialist in Lahore will tell you, sunglasses are part of the prophylactic eye care and an everyday necessity. Read on to know more reasons for investing in a good pair of polarized sunglasses.
What are polarized sunglasses?
The idea behind polarized sunglasses is to reduce the strain and the glare due to light reflection. When light strikes uneven surface, it scatters, and this scattering causes a glare straining the eyes. Polarized glasses have a special chemical applied on them to block this glare. The chemical for polarized glass creates opening that allow only vertical rays to penetrate. The glare-causing horizontal rays are therefore, blocked, making the vision crisper and clearer.
Polarized glasses are ideal for people during fishing, as it cuts the glare from the water. Polarized glasses also make looking at the snow easier. Light rays reflecting from the snow cause a condition called snow blindness, secondary to corneal damage from the reflected rays of the sun. It can be potentially damaging to the eyes but polarized glasses can be helpful for this situation.
- Prevention of sun-related problems
Persistent sun exposure allows UVA and UVB radiation to enter the eye and damage the retina. For optimal safety of the eyes, the American Optometric Association, recommends wearing UV protectant eye-gear throughout the year—even in winters. Visible light is screened 75 to 90 percent in UV protectant and polarized sunglasses. Apart from sunlight, damage is prevented from other elements of the weather like wind, sand and dust.
- Prevention of macular degeneration
Macular degeneration is a condition of the eye where part of the retina deteriorates, impairing vision and eventually causing blindness in some cases. Persistent exposure to the sunlight expedites this process due to the penetration of the ultraviolet (UV) radiation. Wearing polarized glasses decreases the percentage of UV rays that enter the eyes and also reduce the glare improving vision in people with this chronic disorder.
- Prevention of eye conditions
Cataract is the cloudiness in the lens of the eye secondary to ageing and many causes including exposure to sunlight. Glaucoma Research Foundation, states that the prolonged exposure to the ultraviolet radiation speeds up the formation of cataract and worsens vision.
Painful conditions like glaucoma—with increased intraocular pressure—worsen with exposure to damaging rays of the sun. Patients with this serious eye condition can benefit greatly with use of polarized sunglasses.
Pterygium is another eye condition that can benefit greatly from use of polarized and UV protectant glasses. Pterygium is a growth on the surface of the eyeball, which even though is not serious, can be annoying and painful. It is treated with steroids, eye drops and surgery—as well as wraparound polarized sunglasses.
Use of polarized sunglasses is particularly important for people who have undergone eye surgery. Even though the corrective surgeries are generally safe, poor post-op care can turn into complications. Polarized sunglasses can save the eyes from undue strain on the eyes especially after a surgical procedure.
- Better vision
As mentioned before, the vision offered by polarization makes for crisper and clearer images. The images formed with the polarized glasses have minimal color distortion and has increased contrast. In high-glare situations these glasses offer less strain on the eyes and better images. However, polarized sunglasses cannot be used for reading, during driving in the snow, and driving at night. A downside of polarized sunglasses is the difficulty in seeing LCD screens as well.
- Prevention from headaches and migraines
Exposure to bright light in particular sunlight, is a known trigger for migraine and severe headaches. Use of polarized glasses is helpful in reducing the frequency and incidence of these headaches. Migraine sufferers who wear sunglasses can enjoy their time in the outdoors without the fear of headaches.
Polarized eye glasses are generally recommended for people who spend a lot of in the outdoors. For more information about eye health its best to seek help from a professional like Eye specialist in Karachi.