Use:
Avoid:
The lenses in glasses work simply by bending the light in a specific way to aid your vision. As a result, the materials lenses are made from are naturally as reflective as they are refractive.
Untreated these lenses can produce an undesirable glare. Fortunately, there are coatings that can be applied to help reduce the glare by up to 98% known as anti-reflective or non-glare coatings.
Many of these coatings also have enhanced scratch and oil resistant properties, making the more durable and easier to clean than their untreated counterparts.
Transitions and other photochromic lenses are activated by a chemical reaction that takes place in the presence or absence of UV light. As with all chemical reactions, Transitions and photochromic lenses are affected by temperature. The reaction process is slowed by the colder weather resulting in a longer active state when you come indoors. Newer generations of Transitions have helped stabilize this, but at this time there will always be a slight difference between the warmer and colder weather.
Many organizations and institutions, including the National Eye Institute, recommend receiving an eye exam every 1 to 2 years, even if you feel that you are seeing well. Many eye conditions and diseases can be treated early on, before they affect your vision. Once an eye condition affects the vision, treatment may not be able return your vision to its previous state. Certain patients such as those with diabetes, high-blood pressure, a family history of certain high-risk conditions, and those patients that are taking medications known to cause vision issues with long-term use should seek an exam annually.
Progressive lenses combine multiple focal areas that require different powers to see clearly at each stage. In order to achieve this goal and maintain an invisible appearance, lens manufacturers have to compromise in certain areas, typically in the edges of the lens. The great news is that as technology in lenses advances, so does the reduction in blurriness around the edges.
All of these lenses are multifocal lenses. The difference between them is simply that bifocal and trifocal lenses have a physical line in the lens that shows where the different focal points begin and end, whereas the no-line bifocals, or progressive, lenses have no visible line. It is also worth noting that no-line bifocals, no-line trifocals, progressive, and PAL lenses all refer to the same technology.
Small adjustments to glasses can be made when they start to slip; however, the best way to have your glasses is to come in to your local office where we can adjust the glasses at no charge and perform any other maintenance that may be need, such as changing nose pads or tightening screws.
A P.D. (pupillary distance) is the measurement that determines the distance between your eyes. This measurement is important for the placement of the lens' center to provide the clearest vision. This measurement is typically a service of the optical departments and may not be included on your prescription.
Absolutely. One of the most important things that a contact lens wearer can do is ensure that they have a current backup pair of glasses. There may be many situations where you'll find the need to wear your glasses including the two most common reasons, eye infections and running out of your contact supply. While those with a stable prescription may chose to not update their glasses every year that they renew their contacts, those with changing prescriptions should update their glasses and those that have had their glasses for many years.
Finding the right glasses is as much a science as it is a fashion sense. That said, there are definitely things to help anyone start the process for finding the right glasses for them. The most common tool is knowing your face shape, it might sound crazy, but that is what the pros use to help find just the right frame for you. For example, the same shape of frame for someone with an oval face shape would not necessarily be the right shape for a diamond shape face.
