Why Are My Progressive Lenses Blurry? Progressive lenses are optical lenses designed for simultaneous correction of far, medium and near. Progressive lenses use polishing techno...

Refractive errors can affect our vision in a variety of ways and different refractive errors affect our eyes in different ways. Some errors can affect our distance vision so tha...

There are many different vision problems and conditions. Myopia and hyperopia are two common refractive eye errors, which means that they are caused by eye abnormalities that af...

What Is PD? PD, an abbreviation of pupillary distance, also referred to as pupil distance, is the distance between the center of each pupil and the bridge of your nose measured ...

In common cases, people are confused with hyperopia and presbyopia. Both can cause difficulty in reading and fine work. Presbyopia and hyperopia are two different eye problems a...

What Is Computer Vision Syndrome? These days, many of us need to stare at computer screens or digital screens for work or entertainment. That could put a real strain on our eyes...

If you look carefully, you will find there are three numbers on glasses frames. These numbers usually appear on the inner surface of one of the frame temples (the long stem of t...

What Are Bifocal Glasses? Vision changes seem to be related to age. Presbyopia occurs in the middle age of one person, affecting your eye’s ability to focus. But it can be cause...

What Are Glasses Without Prescription? Nowadays, some people wear glasses not only just for correcting their vision, but also for fashion. However, for those people who do not h...

What Are Plano Lenses? Plano lenses are simply optical lenses which provide no corrective power. That is to say. Plano lenses are eyeglasses lenses that provide no vision correc...

What Is Astigmatism? Astigmatism is a common eye condition that causes your vision to be blurry at all distances both near and far because the curvature of your cornea or natura...

Most people have noticed that they have presbyopia around the age of 40, although it varies from person to person. How to treat presbyopia? Treating for presbyopia is reading gl...

If you feel discomfort when getting a new pair of glasses for a long time, how can you tell whether you just need time to adjust to them or whether the glasses prescription is w...

What Is 20/20 Vision? 20/20 vision is a term used to express normal visual acuity measured at a distance of 20 feet. If you have 20/20 vision, you can see clearly at 20 feet wha...

What Is Tunnel Vision? Tunnel vision, also called peripheral vision loss, is a result of the loss of peripheral sight or side vision. A person with peripheral vision loss can on...