VisionSource! - North America's Premier Network of Private Practice Optometrists
North America's Premier Network of Private Practice Optometrists

Eyeglass Lens Designs


Single vision lenses have one focal point and are used to correct near-sightedness or far-sightedness with or without astigmatism. Most patients under the age of 40 to 45 will have single vision lenses prescribed. Single vision lenses may also be used as reading lenses when you need help to see up close but have good distance vision without a prescription.

Progressive lenses provide the best solution for those of us who need help focusing at near, providing clear vision far away, up close and in-between. Progressive lenses are the ideal solution for people who want good vision at all distances in one lens. A progressive lens is much more than a "no-line bifocal". A bifocal lens has 2 focal points as the name implies: distance and near. As we get older and lose more focusing ability at near, the in-between distances become fuzzy with a bifocal. Even the 3 focal points of a trifocal might not be enough to provide comfortable vision at all distances. Plus, with a progressive lens there is no visible dividing line as a telltale sign you are wearing bifocals.


Zeiss VisionAt Optimal Sight we are proud to offer our patients the Zeiss portfolio of progressive lenses. We recommend customized progressive lenses to improve the quality of vision. In general, the greater the level of customization of the progressive lens design, the better the quality of vision you will enjoy. 


To create a truly customized lens, Zeiss uses advanced "free-form" manufacturing. Standard progressive lenses are mass-manufactured with a fixed design to which your prescription is later added. Free-form manufacturing allows the lab to design the lens in real-time, on demand. Since the lens is not manufactured until after you've had your eye exam and selected your frames, we can design the lens to provide the best optics for your unique visual condition, the frame you have chosen and the way that frame fits your face. The progressive lens design will be better aligned to your needs than any other type of lens. Innovative modern technology for progressive lenses and Zeiss vision analysis all contribute to the creation of spectacles that are customized precisely for your wants and needs. We utilize  the i.Scriptions prescription combining Dr. Saeed's traditional refraction data and the data from the i.Profiler and the measurements of your selected frame with the i.Terminal to create your customized spectacles. Click here for more information about the Zeiss Progressive Choice Plus lenses that we recommend for our patients.  These lenses are designed exclusively for one prescription and one patient so that the optics of the lens match your precise vision needs.


For a light-hearted look at presbyopia, the reason that anyone needs a progressive lens or other multifocal, click here for the link to the Presbyopia Song.
Computer lenses may be prescribed to help reduce symptoms of Computer Vision Syndrome or CVS. Computer Vision Syndrome may occur when an individual uses a computer daily at work or home for periods longer than 1-2 hours. Symptoms include eye strain, neck and/or backaches due to tilting the head back to see through a multifocal lens, light sensitivity and fatigue. The constant refocusing effort required while working at a computer stresses the eye muscles affecting comfort and productivity. Computer lenses like the Zeiss Office lens may be prescribed for computer users as a supplemental pair of spectacles. Office lenses provide good intermediate and near vision while allowing a more natural head and neck position when viewing the computer screen.



Lens Coatings


Anti-glare or anti-reflective (AR) coatings
are recommended to enhance the properties of the lens design prescribed for your new spectacles. Uncoated lenses can act like a mirror creating annoying reflections that interfere with your vision. Reflections create hazy, fuzzy ghost images and haloes that affect vision and make it harder to see especially when driving at night, working at a computer, watching TV and working under fluorescent lights. Anti-glare coatings reduce reflections to a minimum for crisper, clearer vision in all lighting situations. We prescribe Zeiss Dura Vision Platinum anti-glare coatings for our patients. Platinum AR coating in addition to reducing glare, has a strong scratch resistant coating to give optimum protection against scratches, has anti-static properties to repel dust and dirt so lenses stay cleaner longer, and is hydrophobic so dirt and moisture slide off the surface to make the lenses easier and quicker to clean. Platinum AR makes you look better too as they eliminate reflections that keep people from seeing your eyes clearly in face-to-face interactions.

Scratch resistant coating may be added to plastic lenses. While the coating will not make lenses scratch-proof, scratches will be less likely with the coating than without. High-index lenses, polycarbonate lenses and all progressive lenses are automatically given scratch resistant coatings at no additional cost.
Ultraviolet coatings will help protect your eyes from the harmful burning rays of the sun. Ultraviolet radiation is not visible to the human eye as the wavelength of the light is too short for us to detect. However, ultraviolet radiation may contribute to cataracts and macular degeneration. Ultraviolet coatings are clear and can be used with or without a tint. A tint will make your eyes more comfortable in the bright sun but not be protective against UV exposure. The ultraviolet coating will provide the protection. High-index and polycarbonate are natural UV inhibitors because of the characteristics of the materials. Transitions, PhotoFusion, photogray and polarized lenses are all dispensed with ultraviolet protection.



Sun and glare protection


PhotoFusion by Zeiss is a brand new self-tinting lens material. The new PhotoFusion lenses will react faster from dark to clear than previous photochromic lenses. This faster reaction speed allows comfortable vision in all light conditions. PhotoFusion lenses are available in plastic, high-index and polycarbonate materials in many lens designs including the newest free-form technology customized progressive lenses.


 Transitions lenses are self-tinting for people who frequently switch between indoors and outdoors. Transitions lenses react automatically to changing light conditions and always offer 100% UV protection. Outside in full sunshine the lenses become sunglass dark. Outside on a partly sunny day the lenses turn semi-dark. Indoors or outside at night or in the rain, the lenses remain clear. Transitions lenses are activated by exposure to ultraviolet radiation. Your car windshield effectively blocks UV so your lenses will remain clear when you are behind the wheel of the car. Transitions lenses are available in single vision, progressive, bifocal and trifocal lens designs and in plasic, high-index and polycarbonate materials.



Photogray and photogray extra lenses are glass lenses that are self-tinting.
Polarized lenses are sun lenses that greatly reduce the glare created by reflective surfaces like water and snow. The polarization filter minimizes the disturbing dazzle which is created when sunlight is mirrored by reflective surfaces. Polarized lenses are available in most lens designs and materials. You may choose gray or brown lenses as preferred. Polarized lenses are also available in our customized sunclips from eClips. eClips gives you the option for a custom sunclip made to fit any frame that you choose.



Tips for spectacle lens care

Proper care extends the useful life of your eyeglasses and ensures better vision. Many spectacle wearers are not aware that improper cleaning is hard on their eyeglasses. Take tissues for example: if you use a tissue to clean your lenses, it picks up debris from the lens which scratches the lens like fine sandpaper as you rub it. These fine scratches wear down the lens' surface and can create a permanent haze over time.
 Wash your lenses daily with the eyeglass cleaner available at Optimal Sight or with mild soap and water to remove dirt and old deposits. Never use abrasive household cleaners that contain ammonia or bleach. Most window cleaners and multi-purpose household cleaners contain grease-cutting components that will "eat" through today's sophisticated lens coatings over time. Use a clean soft cloth to carefully dry the lenses. Microfiber cloths are excellent for cleaning spectacle lenses as they remove grease and moisture without scratching the lenses or leaving marks. Just be sure to wash the microfiber cloth (no fabric softener, please) frequently to prevent smudging the lenses.
Keep your eyeglasses in a case for protection when you are not wearing them. Be careful not to leave your spectacles in the car on a hot summer day. Excessive heat may damage the lenses or lens coatings.