Myopia and hypermetropia are common well known eyesight problems. Generally, it is believed that people will have either of these problems. Prescription glasses were worn to correct these problems. Lenses will either be thick in the middle or at the edges to correct far or near sightedness. For those people who have both near and far sightedness, single vision lenses are not enough. (more eyeglasses details…)
February 6, 2010
Bifocal Reading Glasses – Do You Need Them?
The man behind the invention of bifocal glasses is Benjamin Franklin, who did so in the beginning of the 18th century. The very first eyeglasses were invented way back in the 13th century, which contained convex lenses for magnifying objects, so that it could be more clearly seen by the one wearing them. These glasses were widely used for the correction of farsightedness. (more eyeglasses details…)
Function and Design of Bifocal Lenses
Myopia and hyperopia are the most common vision problems. In most cases, people with vision problem suffer from either myopia or hyperopia. At the same time, most prescription glasses are designed to correct only one type of refractive error. (more eyeglasses details…)
Demystify Your Eyeglasses – Bifocals, Reading Glasses, or Progressives
Eyeglasses are a fashionable way to improve your eyesight and, when you find a style you like they also improve your confidence. If you are one of those lucky people who never needed vision correction until later in life, the options and terminology may be confusing. So lets demystify the lingo and get you seeing clearly again. (more eyeglasses details…)
Bifocal Glasses Explained
Benjamin Franklin invented bifocal glasses in the 1700′s. However, the first eyeglasses were invented centuries earlier. The first eyeglasses, invented in the 13th century, had convex lenses that magnified objects in order for people to see them more clearly. Convex lenses were used to correct farsightedness, the inability to see items clearly that are nearby, such as when reading. During the 14th century, concave lenses were invented. Concave lenses are used to correct nearsightedness, or the inability to focus on object in the distance. (more eyeglasses details…)
February 5, 2010
Bi-Functional Bifocal Safety Glasses
In the modern manufacturing industry, there are many jobs and tasks that require the workers to wear safety eyeglasses or protective goggles. Some of these jobs involve the operation of heavy equipment or materials that are hazardous to the eyes. The eye is absolutely one of the most precious organs for nearly every individual. Performing any of those dangerous tasks, it is necessary to protect the eyes from being hurt or injured. (more eyeglasses details…)
