Varifocals Explained

Varifocal glasses (also known as progressive glasses or multifocal glasses) are a lens that corrects vision at multiple distances. The prescription changes gradually from top to bottom.

The upper portion corrects distance vision. The middle intermediate distances such as a computer screen or dashboard. The lower portion corrects near vision for reading and close-up tasks.

Because the transition between zones is smooth, there is no visible dividing line. This is what distinguishes a varifocal from a bifocal.

You may also see varifocals referred to as progressive lenses or progressive addition lenses (PAL). These are the same thing. 'Varifocal' is the more common term in the UK. 'Varifocal glasses UK' is now one of the most-searched terms in online for prescription glasses.

Varifocal glasses are prescribed for people with presbyopia. A natural, age-related change in the eye that reduces its ability to shift focus between distances. It is caused by the gradual stiffening of the crystalline lens inside the eye and typically begins in the mid-forties.

Early signs of presbyopia include difficulty reading small print, needing to hold things farther away to focus, and feeling eye strain when using screens.

If your optician gives you a reading prescription alongside your distance prescription, varifocal lenses are usually the recommended. They replace the need to carry and switch between separate distance and reading glasses.

A progressive lens transitions gradually through multiple prescriptions. Distance power at the top through an intermediate power in the middle, to near power at the bottom of the lens. All varifocal lenses have peripheral distortion at the outer sides, areas where the transition creates some softness. Good varifocal lens design minimises these peripheral zones and maximises the width of each viewing corridor.

Traditional varifocals were made using standard moulds. Modern freeform lenses are digitally designed for each individual prescription, helping to optimise vision. The result is a wider area of clear sight, reduced edge distortion, and often an easier adjustment period.

Every Direct Sight varifocal, including the entry-level Basic, is a freeform digital design. Premium varifocal lenses at affordable prices.

Varifocal lenses have three prescription zones, distance, intermediate and near, with no visible line. Bifocal lenses have two zones divided by a visible line, with no intermediate correction.

For most people who use screens or drive alongside reading, varifocals are the recommended choice. For a full comparison of cost, comfort, frames, and lifestyle fit, see our guide Varifocal vs Bifocal glasses.

Freeform, also called digital progressive, is the manufacturing method used to produce modern varifocal lenses. Freeform technology uses computer-aided design to calculate the precise lens surface for your individual prescription. All Direct Sight varifocal lenses are digitally produced freeform progressives.

Practical benefits of freeform varifocal lenses UK wearers notice most include:

✓ A wider central corridor of clear vision at all distances.

✓ Reduced peripheral distortion at the edges of the lens.

✓ More precise intermediate vision, particularly noticeable for screen and dashboard use.

✓ A shorter and more comfortable adaptation period for most wearers.

Frame choice directly affects how well your varifocal lenses perform, lens height, frame shape and rim type all play a role. Before you choose a frame, read our dedicated guide best frames for varifocals for expert advice on what to look for.

Most wearers adapt to varifocal glasses within one to two weeks. Consistent full-time wear from day one is the most important factor, switching between old and new pairs extends the process. For a full step-by-step guide covering what to expect and common problems, visit getting used to new varifocals.

Varifocal lenses are available with sunglass tints, for all-distance vision in prescription sunglasses as well as everyday glasses. Direct Sight offers three tinted varifocal options:

Standard tinted lenses: Available in a range of colours and densities, including solid and graduated tints.

Polarised varifocal lenses: Recommended for driving, water sports and outdoor activities. Reduces glare from reflective surfaces.

Photochromic varifocal lenses: Automatically adjust from clear indoors to tinted outdoors. Ideal for those who move regularly between environments.