Sun glasses are a form of protective eyewear designed primarily to prevent bright sunlight and high-energy visible light from damaging or discomforting the eyes. Sunglasses are used to protect the eyes from ultraviolet radiation and blue light, which can cause several serious eye problems.
In prehistoric and historic time, Inuit peoples wore flattened walrus ivory “glasses”, looking through narrow slits to block harmful reflected rays of the sun.Yellow/amber and brown-tinted spectacles were also a commonly prescribed item for people with syphilis in the 19th and early 20th centuries because sensitivity to light was one of the symptoms of the disease.
The use of sunglasses started to become more widespread, especially among movie stars. It is commonly believed that this was to avoid recognition by fans, but an alternative reason sometimes given is that they often had red eyes from the powerful arc lamps that were needed due to the extremely slow speed film stocks used.
VISUAL CLARITY AND COMFORT
Sunglasses can improve visual comfort and visual clarity by protecting the eye from glare. Various types of disposable sunglasses are dispensed to patients after receiving mydriatic eye drops during eye examinations. The lenses of polarized sunglasses reduce glare reflected at some angles off shiny non-metallic surfaces, such as water.
Sunglasses offer protection against excessive exposure to light, including its visible and invisible components. The most widespread protection is against ultraviolet radiation, which can cause short-term and long-term ocular problems such as photo keratitis, snow blindness, and various forms of eye cancer. Medical experts advise the public on the importance of wearing sunglasses to protect the eyes from UV for adequate protection.
While non-tinted glasses are very rarely worn without the practical purpose of correcting eyesight or protecting one’s eyes, sunglasses have become popular for several further reasons, and are sometimes worn even indoors or at night. Fashion trends can be another reason for wearing sunglasses, particularly designer sunglasses from high-end fashion brands.
People may also wear sunglasses to hide an abnormal appearance of their eyes. This can be true for people with severe visual impairment, such as the blind, who may wear sunglasses to avoid making others uncomfortable.
Rathod opticians provides wide range of sunglasses with different patterns and colours thereby adding a stylish look to your appearance. We provide wide range of services along with this. For more details, visit our website at http://www.rathodopticians.com/