Prescription Ophthalmic Lenses
There are numerous lens types to choose from depending on your lifestyle needs. Let the Eyes on Camp Bowie experts help find the right lens design for you!
Single vision (SV) lenses provide one optical power and are indicated for patients requiring a single focus lens for reading or distance vision. SV lenses can be manufactured in various optical materials including CR-39 (plastic), polycarbonate, trivex, mid-index, hi-index, and glass.
Bifocal lenses provide two optical powers separated by a single line. Most commonly, the lens allows a large portion on the top of the lens for distance viewing, and a small segment on the lower portion of the lens for near viewing.
Trifocal lenses provide three optical powers separated by two lines. These lines define the transition between distance, intermediate and near viewing.
Progressive lenses, also known as no-line bifocals, allow a gradual change in lens power and are a more natural and modern form of corrective lens. This gradual change in power allows a seamless transition from up close to far away.
Indoor/Occupational lenses-This lens category is specifically designed to combat computer vision syndrome, also known as digital eye strain. Digital eye strain describes a group of vision related problems secondary to long exposure to computers, cell phones, tablets and digital screens. Symptoms may include eye strain, fatigue, headaches, blurry vision, watery eyes, stiff neck, sensitivity to light, and many other symptoms. Lens designs are personalized for each patient’s lifestyle.
When you choose a material for an ophthalmic lens, it is important to know your prescription, be able to select the proper frame to enhance your prescription, and to understand in what environments you will be using your new eyewear. Some lenses offer superior impact resistance, which may help protect the eye from injury. Others allow the wearer thinner and lighter lenses which can increase your viewing experience. The opticians at Eyes on Camp Bowie have expertise to help you select the best lens material for your needs.
CR-39 lens (index 1.50) is an entry level lens material that provides good optical quality, but has increased weight and thickness when compared to other mid and high index materials
Glass lenses (crown glass 1.50-1.60) is a lens material that is very scratch resistant and provides great optical clarity, but is the heaviest material available on the market and therefore not used as much as the other materials available.
Polycarbonate Lenses (index 1.58) are less likely to fracture or break upon impact when compared to CR-39 or Hi-index lenses. They are also thinner and lighter than a standard CR-39 lens.
Trivex Lenses (index 1.53) are very similar to polycarbonate lenses in that they are very durable upon impact. In comparison, Trivex lenses have a higher Abbe value which provides more optical clarity and less chromatic aberration or color fringing.
Hi-index materials (index 1.60-1.80) are thinner and lighter when compared to standard plastic lenses and reduce lens thickness. As the index of the material goes up, the Abbe value goes down which can affect the lens optical performance. It is imperative that trust our opticians to aid in selecting the best lens materials that will maximize your optical clarity without compromising on cosmetics.
Hi-index material Mid-index material CR-39 lens material
Anti-scratch Coating. Anti-scratch is a durable coating that is added to an ophthalmic lens to aid in scratch protection.
Anti-Reflective Coating. Anti-reflective (AR) coating or “non glare” is a lens enhancement applied to the front and back surface of an ophthalmic lens to help increase the transmittance of light through the lens. This reduces the appearance of glare off of computer screens and around headlights when driving at night resulting in less eye fatigue while also improving the cosmetic appearance of the lens. Newer AR coatings are less likely to chip or craze, easier to keep clean, and have superior scratch protection which can extend the life of your lenses. Ask us about Crizal AR coatings today!
Lens without AR Coating Lens with AR Coating
UV Protection-Just as sunscreen protects your skin from harmful UV rays, a UV protective coating protects the eye from sunlight which can contribute to cataract formation and wrinkles.
Blue Light protection Lenses. Blue light is a part of the visible light spectrum and comes from natural sunlight outdoors and from digital devices. This wavelength of light gets absorbed into the posterior or back part of the eye giving it the potential to impact the retinal health. Blue light protection lenses may also
contribute to a more relaxed eye, and provide protection from the potentially harmful blue light exposure.
Blue reflection off lens surface shows blue light protection is active
Photochromic (light-reactive) Lenses are almost clear indoors and automatically darken according to the amount of UV light exposure. They are available in various colors and tints and now have mirror coating options. These lenses are loved by those patients with an active lifestyle.
Photochromic lens on right before UV activation. Note mild tint indoors without UV activation
Photochromic lens on right after UV activation
Note marked darkening of lens with direct sunlight
Digital lenses, or high definition lenses, are manufactured using precise laser technology and are available in single focus and progressive lenses. These free-form lenses use personalized measurements to provide the wearer outstanding clarity, a wider field of view, and improved optics in the periphery. Some of the most popular lens manufacturers are Shamir, Hoya, Zeiss and Essilor. Ask our experts at Eyes on Camp Bowie which lens best suits your lifestyle.
At Eyes on Camp Bowie we utilize the latest lens technologies to provide you thinnest, lightest prescription lenses available!