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Bifocals allow the wearer to read through one area of the lens, and to focus on distant objects through another area of the lens. As the eyes age, though, a stronger prescription is often needed to read. This would be fine, but the stronger prescription that allows for reading makes it difficult to focus on objects at intermediate distances, such as grocery items on a shelf or your speedometer. Thus, trifocals are necessary for a third prescription for intermediate focusing.

Trifocals, also known as line trifocals, feature three areas of focusing power, each separated from the other by a distinct line. The three windows allow for focusing on distant objects, intermediately distanced objects, and for reading. The downside of trifocals is dealing with the lines between the different focusing powers. Fortunately, recent advances in technology have led to developments in no-line, or progressive lenses.

Featured Articles

Allergies are one of the most common eye...
June 12, 2019
Kennedy Eyecare
Ocular allergies are among the most common eye conditions to hit people of all ages. Though typically worse in the high allergy seasons of spring and summer, some people suffer with these problems all year. This is especially true for people who have allergies to pet dander, mold, dust mites, and other common allergens that tend to linger throughout the year. The hallmark sign of ocular allergies is itching. While itching can be a symptom of other eye conditions, the likelihood that......

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Discover all the latest advancements in lens technology with our online video libray. From adaptave technology to uv filters, we have all your lens needs covered.

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