Knowledge Base!

Information: Products and Service

At Gumm’s Optical Shoppe we strive to fit and fabricate eyeglasses to the highest possible standards. This means using top quality frames and lenses, fabricated in our own lab using the best equipment operated by skilled technicians. An experienced, qualified optician will perform your fitting and adjusting, with no charge! This service you don’t get one hour at a time. Although, we do not offer eye examinations, we do provide assistance in selecting new Frames and Lenses and Contact lenses, if needed. We offer free eyeglass adjustments, and professional cleaning.

Lens Materials:

  • Plastic: Conventional hard resin lenses are half the weight of glass lenses and can be either clear or tinted to almost any color.
  • Polycarbonate: This is the lens of choice for anyone concerned with safety and sports eyewear because it is the most impact resistant lens available. People with Higher plus or Higher Minus Prescriptions prefer this material, because it allows the lens to be much thinner and lighter then conventional Plastic.
  • Hi-Index lenses: Modern technology has created lenses that bend light differently so that stronger corrections are thinner than when made in conventional plastic materials.
  • Glass: Conventional crown glass has improved scratch resistance, but it is the heaviest lens material and the least safe regarding impact resistance and breakage.

Lens Designs:

  • Single Vision Lenses:Most appropriate when correction is needed for only one distance or only one power is needed to see clearly at all distances.Single Vision Lenses:
  • Bifocal Lenses: Bifocals provide correction in 2 powers – distance & near. Bifocals are necessary when a single vision lens no longer provides the best vision at all distances.Bifocal Lenses:
  • Trifocal Lenses:Trifocals provide correction for 3 powers – distance, intermediate & near. As the need for stronger reading lenses progresses, a gap develops between the distance and near zones of a bifocal causing blurred vision at arms length. A trifocal can provide correction for reading and an intermediate zone. While not as continuous as a progressive lens design, a trifocal does provide clarity beyond the reading distance out to approximately 3 feet. (Depending upon prescription)Trifocal Lenses:
  • Progressive Lenses:Most beneficial when you need a different prescription for multiple focuses. A progressive lens contains no line; instead, there is a gradual change of power along a “channel” from distance to near.Progressive Lenses:
  • Computer Lenses:Extensive computer use requires correction for the computer distance in the straight ahead position of the lens (so you do not have to tilt back and strain your neck in order to see clearly at that working distance). Computer lenses are designed to provide computer correction in the middle of the lens with reading below and distance correction in the upper portion of the lens so you can look up and see clearly across the room.Computer Lenses:
  • Occupational Lenses:Occupational lens designs are available to meet the special needs created by certain work environments. Many occupations require near work both below and above eye level (plumbers, electricians, carpenters, mechanics, etc.). Specially designed lenses can provide near correction in both the top and bottom portion of the lens.Occupational Lenses:
  • Sports Glasses: Many lens designs and lens treatments are available for the special needs of sports enthusiasts. From swim goggles to ski goggles, fishing lenses to shooting and biking lenses, they are designed to help you get the most out of your endeavors with visual efficiency, comfort and safety. Polycarbonate is the material of choice for active sports.

Lens Treatments:

  • Scratch Resistant Coating: As plastic is a softer material then glass, a coating is provided to help resist scratches. This special coating can help protect your lenses from any scratches that may occur through out the day.
  • Anti-Reflection Coating: Anti-reflective coating is particularly effective for reducing eye fatigue from computers, night driving and fluorescent lights that cause glare. This also enhances the appearance of the lens and glasses by removing all distracting reflections from the lens surface.
  • Polarized Sun Lenses: Polarized lenses eliminate reflected glare from surfaces illuminated by bright sunlight. They are great for driving, fishing, hunting, and all types of outdoor activities. They are available in many different colors.

Lens Tints:

  • Sun darkening lenses: Lenses that darken as you go from indoors to outdoor sunlight are available in glass, plastic and Hi-Index. Such lenses are known as “Photochromatic” or “Transition” lenses.
  • The First pair of photochromatic lenses were made in the 1960’s by the Corning Inc. The first successful plastic photochromatic lenses were introduced by Transitions Optical in 1991.

These are by no means the only lens materials, designs, or treatments available. Please tell us your work or leisure visual interests and we can tailor exactly the right lenses for all your visual needs.