CK900

CK900 Prescription Glasses

A clean rectangular frame works at the office, at home and everywhere in between. The CK900 is a unisex full-rim rectangular frame, sized 48-15-130, in Black or Blue. You can order it with single vision, varifocal or bifocal lenses made to your prescription. It belongs to the Carlton collection.

Choosing your CK900 colour

Black. Black is a deep, solid black. It defines the eyes and goes with every outfit you own.

Blue. The Blue version is navy. It brings a cool, calm touch of colour that suits most skin tones.

Each colour is shown in the gallery, so you can compare them side by side before you decide.

Why you will like it

Rectangular lenses suit round and oval faces, adding a bit of definition.

It is the kind of frame that works with most outfits, which makes the CK900 an easy pick for everyday wear.

How to wear it

Keep the rest of your look simple and let the frame do the talking. It works just as well with workwear as it does with weekend clothes.

How it fits

At 48mm per lens, it is on the smaller side, which is ideal if most frames feel too wide. The 15mm bridge is narrow, so it sits securely on a slimmer nose. The 130mm arms are a little shorter than standard. Across the lenses and bridge it measures about 111mm.

Not sure about sizing? Compare these numbers with the ones on the inside arm of a pair that fits you well. A difference of two or three millimetres or less usually means a similar fit.

Lens options for the CK900

Pick the lenses that match your prescription:

• Single vision: one prescription across the whole lens, for distance, reading or the computer.
• Varifocal: near, intermediate and distance in one lens, with no visible line.
• Bifocal: a separate reading segment in the lower part of the lens.
• Ready readers: simple magnification if you just need help with close work.

The 33mm lens depth is on the slim side, so single vision or bifocal lenses usually work best. Want lighter lenses? A high-index lens is thinner than standard plastic. Pair it with an anti-reflective coating for less glare when you drive after dark.

Before you order

Make sure your prescription is in date; most adults in the UK are advised to have an eye test every two years, and your optician will tell you if you need one sooner. You will also need your PD, which tells our lab where to centre the lenses. With those two things ready, ordering takes a few minutes: choose your colour, pick your lenses, enter your details and you are done.

From our lab to you

Every pair is made to order in our own UK lab. Your lenses are cut to your prescription, fitted into your CK900 and checked by our technicians before they are sent out.

Looking after them

Rinse off any grit before you wipe, dry the lenses with a clean microfibre cloth, and take your glasses off with both hands so the arms stay aligned. See our lens care guide for more.

Questions we often get

Is the CK900 suitable for varifocals?

The 33mm lens depth is fairly shallow, so single vision or bifocal lenses usually work better.

Is the CK900 comfortable for all-day wear?

Yes. It is a lightweight frame, and a thinner lens for a stronger prescription keeps the weight down even further.

Is it a small frame?

Yes. With 48mm lenses it suits smaller faces.

Will it suit a narrow nose?

Yes. The 15mm bridge is designed for slimmer noses.

Do you make the lenses yourselves?

Yes. Every pair is made to order in our UK optical lab, where your lenses are cut to your prescription and fitted into your frame.

Still deciding on the CK900? Browse more prescription glasses.