What are varifocal lenses?

Varifocal lenses, also called progressive lenses, are designed to correct more than one viewing distance in a single lens. The upper part of the lens is normally used for distance vision, the middle area helps with intermediate tasks such as computer work, and the lower part helps with reading and close detail.

Unlike bifocals, varifocals do not have a visible dividing line. The prescription changes gradually through the lens, which gives a cleaner appearance and a more natural transition between distances.

Who are varifocals for?

Varifocals are usually recommended when your eyes start needing different help for distance and reading. This commonly happens from your early to mid-forties onwards due to presbyopia — the natural age-related change where the eye gradually loses some close focusing ability.

You may benefit from varifocals if you are constantly swapping between distance glasses and reading glasses, lifting your glasses to read, or struggling to move between driving, phone use, shopping, laptop work and close tasks.

How do varifocals work?

A varifocal lens works by placing different prescription powers into different areas of the lens. You do not look through the whole lens in the same way. Instead, your eyes and head naturally move to the part of the lens that matches the distance you are looking at.

• Distance vision: usually through the upper part of the lens.
• Intermediate vision: usually through the central corridor.
• Reading vision: usually through the lower part of the lens.

The honest part: varifocals take some adjustment

Good varifocals can feel very natural, but there is usually an adaptation period. The sides of a varifocal lens contain areas of softer focus or distortion. This is normal. Better lens designs manage this better, but no varifocal removes it completely.

Most people adapt well when the prescription, frame choice, lens design and fitting measurements are correct. Problems are more likely when the frame is too shallow, the measurements are inaccurate, or the lens design is too basic for the wearer’s needs.

Are varifocals better than reading glasses?

Not always. Reading glasses are simple, affordable and often excellent for close work. If you only need help for reading, they may be all you need.

Varifocals make more sense when you want one pair of glasses for everyday movement between distances. They are especially useful for shopping, meetings, driving, walking around, checking your phone, travelling and general daily wear.

Are varifocals good for computer work?

They can be, but it depends how much screen work you do. Standard varifocals include an intermediate zone, but that zone is usually narrower than the distance or reading areas. If you spend long hours at a desk, occupational or office lenses may be more comfortable.

This is where honest dispensing matters. A varifocal is not automatically the best lens for every task. Sometimes the best answer is a varifocal for everyday life and a separate occupational pair for extended computer work.

Why frame choice matters

Not every frame is ideal for varifocals. The lens needs enough vertical depth to hold the distance, intermediate and reading zones comfortably. A very shallow frame can restrict the usable reading area and make the lens harder to adapt to.

The frame also needs to sit consistently on your face. If it slides down, tilts forward too much or sits unevenly, the lens zones may not line up correctly with your eyes.

Why fitting height matters

Varifocals rely on accurate measurements. Pupillary distance is important, but fitting height is just as important. Fitting height measures where your pupils sit vertically within the frame when the frame is actually worn.

If the fitting height is wrong, you may feel as though you are searching for the clear area, lowering your chin too much, lifting your head to read, or never quite finding comfortable vision.

Can you order varifocals online?

Yes, but they need to be handled differently from simple single vision glasses. Varifocals should not be treated as a basic checkout add-on because the measurements and frame position matter too much.

At Burghley & Co, varifocal orders are reviewed personally. The frame is sent first, measurements are confirmed, and the frame is then returned for glazing. This protects the final result far better than guessing measurements from a screen.

What type of varifocal lens should you choose?

Varifocals are not all the same. Basic varifocals can work well for simple needs, but they often have narrower usable areas and more noticeable peripheral distortion. Premium and personalised designs usually offer wider, smoother vision and are better suited to stronger prescriptions, larger reading additions or people who rely on their glasses all day.

The right lens depends on your prescription, frame, lifestyle and expectations. A person who wears glasses occasionally may not need the same lens design as someone who drives, works on screens, reads frequently and wears glasses from morning to night.

Common varifocal problems

The most common problems are not always caused by the lens itself. They can come from poor frame fit, inaccurate measurements, unrealistic expectations, an unsuitable lens design or a prescription change that needs time to settle.

• Feeling swim or distortion at the sides
• Difficulty finding the reading area
• Needing to move the head more than expected
• Computer vision feeling restricted
• Frame slipping and changing the lens position

These issues are why professional advice matters. Varifocals are a dispensing product, not just a lens option.

Related guides

For more help, read our guides to understanding your prescription, pupillary distance, choosing prescription lenses and choosing glasses frames.

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