Choosing Varifocal Frames with Enough Lens Depth for Better Near Vision

Choose varifocal frames that leave enough usable lens space below your pupils for the reading area, then have the fit checked against your chosen lens design. A frame’s overall depth is a useful starting point, but it cannot tell you on its own how comfortably you will read.

When browsing Ardor Eyewear’s varifocal glasses, shortlist frames with reasonable vertical depth and a secure fit. The aim is to reach the near section naturally when you lower your gaze towards a book, phone or menu.

Check lens height separately from frame size

Three measurements are particularly easy to confuse:

For illustration, a lens could be 32 mm deep while your pupil sits 18 mm above its bottom edge. That gives an 18 mm fitting height to compare with the lens specification. These example figures are not recommended minimums: they show why measuring the complete lens opening cannot replace measuring its position on your face.

The familiar numbers printed inside a glasses arm, such as 52–18–140, normally describe lens width, bridge width and side length. They do not give you lens depth. ABDO’s frame sizing guidance explains these markings and why identical measurements can still produce different fits.

Open the product’s size details and look specifically for lens height. If it is missing, ask for that measurement before deciding.

How much lens depth is enough

There is no single minimum depth that guarantees good near vision for every varifocal wearer. The relevant requirement is the lens design’s minimum fitting height, checked against where your pupils sit in the selected frame.

Ask the dispenser to confirm that the finished lens will retain enough of the reading area. Merely meeting a minimum fitting height can leave part of that area cut away, depending on the design and frame contour.

A short corridor design reaches the reading power over a shorter vertical distance and may accommodate a shallower frame. However, a shorter corridor can involve compromises in intermediate viewing space and peripheral clarity. Discuss the corridor’s fitting requirements with your dispenser before committing to a particularly shallow style.

A useful question is: “Will this frame and lens combination give me comfortable access to the full reading power?”

Look closely at the lower lens shape

Compare the space beneath your pupils, including towards the nose. A frame can have a generous maximum depth while its lower inner edge curves upwards into the area needed for reading.

Rounded, square and deeper rectangular shapes are sensible styles to compare. A shallow rectangle needs closer checking, while a round or cat-eye label alone cannot confirm suitability.

Treat the outline as part of the fitting assessment. Ask the dispenser to check the actual lens shape against the proposed reading area. A front-facing product photograph helps you shortlist styles, but it cannot establish your individual pupil position.

Get a stable fit before taking measurements

The frame should settle comfortably on your nose and remain level when you look down. Check that it does not slide, pinch at the temples or rest on your cheeks. Adjustable nose pads can help refine positioning; a well-fitting moulded bridge can also work.

Ask for the frame to be adjusted before fitting measurements are recorded. Measuring a frame that is subsequently raised, lowered or tilted changes the relationship between your eyes and the lenses. The dispenser may also assess lens tilt and distance from your eyes, depending on the design. ABDO’s lens fitting guidance describes how frame position informs customised lenses.

During the fitting, use your normal head posture. Mention if neck stiffness affects how easily you look down; this helps the dispenser assess a comfortable reading position.

Match the lens choice to your reading habits

Be specific about what you want to see. Reading a paperback in your lap, checking a phone and following a recipe on a kitchen worktop involve different distances and viewing angles.

Bring a familiar reading item to the appointment and explain how you normally hold it. If you already wear varifocals, bring those too and describe what works: perhaps books are comfortable, but you struggle to find the right area for your phone.

Discuss the lens design alongside the frame. Ardor’s varifocal lens guide outlines its lens options. Ask how the proposed option supports your main near task within your chosen frame. A larger frame alone cannot determine the width or position of the clear reading zone.

Confirm the details before ordering and on arrival

Before placing an order, contact Ardor Eyewear with your shortlisted frame and ask:

• What is the lens height for this exact frame size?

• Which varifocal design is suitable for my prescription and reading needs?

• How will my individual fitting heights and pupil measurements be obtained and checked?

• What fitting support is available if the finished glasses slip or reading feels awkward?

Once the prescription lenses are fitted, try your usual reading material at its normal distance in good light. Lower your gaze into the near area and notice whether you repeatedly lift the glasses or adopt an uncomfortable head position to find focus.

Report those specific difficulties to the dispenser. ABDO’s advice on checking new glasses recommends returning when adjustment is needed or vision feels wrong. Adaptation takes time, but persistent difficulty deserves a fitting and prescription review.

Frequently asked questions

Can I choose deeper frames if I have a small face?

Yes. Look for useful vertical depth within a frame width and bridge that suit your face. Increasing the overall size simply to gain depth can create an unnecessarily bulky fit.

Do thinner lenses mean I can choose a shallower frame?

No. Lens thickness and vertical lens depth are different dimensions. A thinner lens material does not remove the chosen varifocal design’s fitting-height requirement.

Can my current frames be reused for varifocals?

Possibly. Ask the dispenser to assess their condition, stability, lens shape and available fitting height. Having previously held prescription lenses does not establish suitability for your new varifocal design.

Is pupillary distance the same as fitting height?

No. Pupillary distance concerns horizontal pupil positioning; fitting height concerns vertical positioning within the frame. For varifocals, ask how both will be checked for each eye.