- Single Vision
- Lined Bifocal
- Lined Trifocal
- Progressive (No-Line Bifocals)
- Computer Lenses
- Basic Plastic (CR-39)
- Mid Index
- High Index
- Extra Scratch Resistance
- Transitions / Photochromic
- Ultraviolet Protection
- Mirror Coatings
- Flash Coatings
- Edge Tints
- Engraved designs / initials
Single Vision means there is a single power in the lens. This usually means your distance prescription but could be set for any distance that is desired. The power could be set at computer distance or reading distance.
Bifocal lenses mean there is two different powers in the lens. Typically this is distance vision at the top and reading power in the bottom segment of the lens. Again the powers could be specified to be for any distance such at putting computer prescription at the top and reading at the bottom.
Trifocal Lenses mean there is three different powers in the lens. Typically the top is for distance, the middle segment is for intermediate distances such as computer and dashboards of cars, and the bottom segment is for reading distance.
Progressive Lenses (also known as no line bifocals): These have a blended and progressive change in power as you move your eye up and down in the lens. Typically the top area is for distance vision and then the power of the lens increases for reading gradually as you look lower in the lens. The advantages of these lenses are a smooth transition of power thru the lens, no image jump as you cross over lines like in bifocals and trifocals, better cosmetic appearance to the lenses, and the ability to find a spot in the lens that is clear at any distance. Progressives can sometimes take people a little while longer to get used to wearing, but once you adapt and learn how to use the lenses, they are wonderful products that have a lot of technology and research put into their designs.
We have a great selection of materials that can be used to make your eyeglass lenses. There really are benefits and features of each that make them special and useful.
Basic Plastic: Often referred to as CR-39, this material is commonly used today. It has good optical properties and is the least expensive material. It has moderate shatter resistance, blocks 80% of UV light, and moderate scratch resistance.
Polycarbonate: Benefits include being light weight and very shatter resistant. Does not resist scratches very well and has worse optical properties than plastic.
Trivex: Called trivex for its 3 significant benefits 1) Lightest weight lens material available 2) Great scratch resistance and durability 3) Much better optical quality than polycarbonate
Higher Index Plastics: The higher the index of refraction of the material, the thinner your lenses will be. This is because the more the material bends light, the less material is needed to create your prescription, and the less material needed, the thinner and lighter you lenses can be. The higher your prescription, the more benefit you will get from choosing higher index plastics. We have 1.60, 1.67, 1.70, and 1.74 index plastics available from our laboratories.
Glass: The beneifts include great optical properties and scratch resistance. But the downsides are very low shatter resistance and very high weight. Glass is becoming less common and fewer laboratories are working with it. Price fluctuations and a reduction in the available products has been seen over the last several years as well. We never know when an accident could happen and having glass lenses is not the safest choice for lens material because of the potential for glass lenses to shatter. Glass shards in your eye = not a good thing!
Anti-Reflective Lenses: These are coatings that are applied to lenses after the powers have been created in them. The coatings available today do a great job of improving our vision by decreasing the reflections off the front and back surface of our lenses. The higher quality anti-reflective coatings are amazing at durability, scratch resistance, and are easy to clean by repelling oils and dust. An uncoated basic plastic lens loses at least 8 percent of the available light due to reflections. With a quality AR coat, the percentage of light lost to reflections is less than 0.5%. As the index of refraction of the lens material increases, the amount of relected light increases thus making AR coatings even more beneficial. Benefits from AR coatings include reduced eye fatigue, improved night vision, clearer vision, less strain at computers, less front and backside glare off lenses, and allowing other people to see your eyes and not the reflections off your lenses.
Scratch Resistant Coatings: The durability and scratch resistance of your lenses can be improved with the application of these coatings. This is included at no charge with anti-reflection coatings.
Transitions: This is a treatment to the lens material, not a coating. It causes the lens to become darker with exposure to ultraviolet (UV) light. The chemical reaction occuring inside the lens material is affected by temperature and amount of UV light present. The lenses will get darker in colder weather than they do in warmer weather. The windshield of most cars block most of the UV light and thus these lenses will not get very much tint inside of the car. Advancements in recent years have brought new products to the market that get darker, change quicker, and are clearer when indoors.
Tints: There are many tints to choose from and mostly it is a personal preference on what you will like. Grey tints do not change your perception of colors. Browns will alter our perception of some wavelengths of light. We have many samples of colors you can try out to see which ones your prefer.
Polarization: This is a filter placed inside your lenses. Polarization eliminates the glare from reflected light. It can improve your vision when sun glare is causing problems such as driving and boating.
Ultraviolet coatings: This will increase basic plastic and glass lenses to 100 percent UV blocking lenses. All the other lens materials we use already have 100% UV blockage included in them.