Can you put new lenses in your old frame?

Putting new lenses in your old frame is one of the few genuinely cheap upgrades in eyewear. You already own the expensive-looking part. If it still fits your face and you still like it, there is often no reason to buy another.

When new lenses in your old frame works well

Full-rim frames, plastic or metal, are the easy case. The lens sits in a groove all the way round, so the new lens is simply cut to the same shape and pushed in. If the frame is straight, the hinges are firm and the plastic still has some give, this is routine work.

It is also the right call when your power has changed but nothing else has. A frame that suits your face is worth keeping, and a new prescription in it costs the lens price only. That means from NPR 750 for a single vision blue coat lens rather than NPR 1,749 for a complete new pair.

When it is a gamble

Rimless frames hold each lens with two small screws through drilled holes. Remounting means lining up new holes with the old mounting points, and drilled acetate or polycarbonate can crack at exactly that spot. Half-rim frames use a nylon cord in a groove cut into the lens edge, which is more forgiving but still fussier than full-rim.

Age matters more than people expect. Acetate that has spent two summers in a car or on a motorbike goes chalky and brittle. You can often see it: the colour dulls, and the surface loses its gloss. Flex a frame like that to fit a new lens and it snaps.

So we do three things before agreeing. We flex the frame gently to see how it responds, we check the hinges and the screw threads, and we look at the rim for hairline cracks. If it fails any of those we say so, because a frame that breaks on the bench is worse for you than a straight answer.

What you are actually paying for

The lens, the cutting, and the fitting. We measure your PD again rather than copying the old lens, because optical centre position matters and the old pair may have been wrong. We also re-measure the frame, since frames stretch slightly with wear.

Turnaround is the same as any new pair: one to three working days for most single vision powers, longer for progressives. Our guide to how long glasses take to make covers the details.

The one thing worth changing anyway

If you are re-lensing, this is the moment to upgrade the coating rather than repeat what you had. An anti-reflective multi-coated lens at NPR 1,800 makes more difference to night driving and screen comfort than most people expect, and you will never notice it if you only ever buy the cheapest option. If your power has gone past about minus 4, ask about a thinner lens too, which the high index guide explains.

When to just buy a new frame

If the frame already slides down your nose, re-lensing preserves the problem. If a hinge is loose enough to need force, it will get worse. And if you have simply stopped liking it, a frame you do not wear is not a saving.

Bring the old pair to either showroom, Pulchowk in Lalitpur or Boudha in Kathmandu, and we will tell you which way it falls. The eye test is free while you are there, and if the answer is a new frame you can browse eyeglasses from NPR 999 without committing to anything.

What we check before saying yes

Three things, in about a minute at the counter. We flex the rim gently to see whether the material still has give or has gone stiff and chalky. We open and close both hinges to feel for grit or play, because a hinge that is already loose will not survive being worked on. And we look along the rim in good light for hairline cracks, which are usually invisible until the frame is under tension.

If all three pass, re-lensing is routine. If any one fails, we say so before taking your money rather than after breaking the frame. That is not us being cautious for the sake of it: a frame that snaps on the bench leaves you with no glasses at all until a replacement is made, which is a worse outcome than buying a new frame in the first place.