According to the explanation from en.wiktionary.org, the word eyewear can be used to describe a vision aid or similar device worn over the eyes, such as eyeglasses, contact lenses or protective goggles. In this sense, eyewear is a broad concept. Even within each type, there are various categories. For instance, there are basically prescription eyeglasses and non-prescription spectacles. This approach to classification is simply based on eyeglass lenses which may be made of power of not. In fact, sunglasses in different types also fall into the category of eyeglasses. Even if they can be quite different in style, there are actually no significant differences in their designs. When it comes to contact lenses, there are similarly two groups. Contacts lenses incorporated with any powers are called prescription contacts which are used to correct refractive errors. In most peoples mind, protective goggles are simply used to prevent the precious eyes from being injured. But the truth is that it is not all function of protective goggles. In accordance with the aforementioned explanation of eyewear, prescription eyewear as a generic concept can be referred to prescription eyeglasses, prescription contact lenses or even prescription goggles. (more…)
