Single vision lenses correct one distance at a time and are used either for reading, distance vision, or computer work.

Bifocals offer two distinct viewing zones with a visible line—one for far and one for near.

Trifocals add a third segment for intermediate distance, usually computer range.

Progressive lenses combine distance, intermediate, and near vision in one seamless lens with no visible lines, giving a modern and natural viewing experience.

Single vision lenses are ideal when you only need correction for one vision distance. They are commonly used for driving, everyday distance vision, reading, and computer tasks. They are lightweight, easy to adapt to, and perfect for younger wearers or anyone who prefers a simple, clear lens with excellent optical clarity.

Both are excellent options if you prefer visible lines that clearly separate viewing zones. Bifocals are the best choice when you need distance and reading correction. Trifocals are recommended if you also spend time working on a computer and require an intermediate zone. Many people choose lined lenses because they are familiar, easy to adapt to, and provide instant access to each vision area without searching through the lens.

Progressive lenses provide distance, mid-range, and reading correction without any visible lines. They offer a smooth transition between viewing distances and a more natural, comfortable experience. Most wearers appreciate the modern appearance, especially those who don’t want visible segments in their glasses. Progressives are a great everyday solution for active lifestyles and constant switching between near and far tasks.

The right choice depends on personal preference. Lined bifocal and trifocal lenses make each zone very clear and easy to find, which can be helpful if you are used to traditional designs. Progressive lenses offer seamless clarity and a clean, modern look without lines. They are excellent if you want a more natural visual experience and prefer glasses that look like single-vision lenses.

Single Vision Lenses: Traditional lenses designed to correct a single field of vision, such as distance, intermediate, or near. These lenses are cost-effective and widely used.

Digital Single Vision Lenses: Manufactured using advanced digital technology to provide:

• Sharper optics with reduced peripheral distortion.
• Wider fields of view, especially beneficial for higher prescriptions.
• Enhanced clarity for a more comfortable viewing experience.

Digital lenses are ideal for anyone seeking the next level of optical precision.

• Lined Trifocals: These lenses have three distinct viewing zones: distance, intermediate, and near.
  
• No-Line Progressive Bifocals: Also known as progressive lenses, these provide a seamless transition between distance and near vision without visible lines.
  
  

• OD (Oculus Dexter): Information for your right eye.
• OS (Oculus Sinister): Information for your left eye.
• OU (Oculus Uterque): Refers to both eyes.

• SPH (Sphere) Indicates the lens power required to correct your vision:
  ** Nearsighted (Myopia): Marked with a minus (-) sign. Difficulty focusing on distant objects.
  ** Farsighted (Hyperopia): Marked with a plus (+) sign. Difficulty focusing on close objects.

• CYL (Cylinder) Specifies the lens power needed to correct astigmatism (difficulty focusing due to irregular cornea shape):

** Nearsighted Astigmatism: Marked with a minus (-) sign.
** Farsighted Astigmatism: Marked with a plus (+) sign. Note: If your prescription has a CYL, it will always include an AXIS value.

• AXIS: Defines the orientation of astigmatism correction: Measured in degrees, ranging from 0 to 180.This specifies the exact position of the astigmatism on your eye.

• ADD (Addition) Indicates additional lens power for reading or bifocal/varifocal glasses: Shows how much magnification is needed for close-up tasks or intermediate distances.

• PRISM: Used to correct conditions like a lazy eye or squint: This adjustment shifts the focus of the lens to align the image properly on the retina. Included in prescriptions for special vision needs.

You can absolutely order single vision or Digital single vision lenses if your prescription has a bifocal. If you uploaded a copy of your order you will have SPECIFY if you only want single vision, and if it is for distance or reading.

If you order Single Vision lenses and don't specify what type of prescription you need Glass Lens Eyewear will not be responsible for the lens error. We will remake new lenses at a substantially discounted rate.

We do offer Double segment prescription bifocals, commonly referred to as Double D bifocals within the optical industry. These lenses specially designed for individuals who require enhanced visual assistance. These unique lenses feature two distinct segments resembling the capital letter ‘D’ – one positioned at the upper and another at the lower part of the lens.

Professionals such as electricians, mechanics, and plumbers often find themselves working in tight and confined spaces, necessitating the ability to view objects up close, above, and below them without the need to constantly adjust their heads. The ingenious placement of the bifocal segments on the Double D lenses allows these individuals to effortlessly glance up or down and access the full bifocal power, enhancing their efficiency and convenience at work.