What are bifocals?

bifocals are a type of glasses for people designed for people who need both loved ones and forescribing vision correction. Unlike one sight lenses, they have two correction lenses on each side of the glasses, a total of four lenses per couple.

Many people wear correction lenses with one vision for many years until their vision changes and require bifocals for overall vision correction. However, there is a misconception that only aging people require this type of glasses. Although it is true that a person's vision may change with age, requiring a transition from one eyes to bifocals, many people suffer from a combination of a loved one and foresight long before they realize it. In some cases, bifocals can also help correct astigmatism that is present in combination with other refractive defects.

There are several different types of bifocals and a licensed optician can help patients with a prescription to choose the best type for their needs. Nine years of years have been carried out trade fairs in lens engineering to make a linkY has removed in many corrective bifocars. Progressive lenses, for example, correct vision in different forces depending on where one looks through the lens, but the lines are missing.

Although most people who require bifocals have trouble focusing on farm objects, they have always been designed with a correctional lens for close focus to the bottom and correction lens for the top of the distance. While this design once made sense, because for reading and writing it was generally necessary to focus in a narrow range, the activity traditionally pre -defined by looking down, more and more people consider it unpleasant to use such lenses with computer. Since the computer's monitor is directly in front of the user, some glasses seem to be up close on the spot.

There are lenses in development to remedy this common problem, but in the meantime many people who require bifocals have found that contactThe lenses are the best choice for their vision correction. They wear contact lenses than glasses, including improved visual acuity. Contacts provide better peripheral vision and eliminate the need to adjust the head angle for using a computer.

Not all visual problems can be corrected by contact lenses, but people should consult their optometristic or ophthalmologist if they want to change from bifocals and contact the lenses. Because visual acuity may change over time, people should have their eyes checked at least every two years.