Manufacturing brief · Request for development and quotation

Reading glasses with individually interchangeable lenses.

One frame and separate lenses from +0.5 to +4.0, sold in three gift boxes. The user can fit a different strength in each eye and change a lens at any time.

ProductFrame + interchangeable lenses

Strengths+0.5 to +4.0, in 0.5 steps

Packaging3 gift boxes, 8 lenses each

Fixed requirementClosed box max 3 cm high

Contents of one gift box

One frame and eight lenses.

Four strengths, one lens for each eye. Every lens has its own labelled place. Shown: the MEDIUM box (+1.5 to +3.0).

Open MEDIUM gift box seen from above: frame at the top, right-eye lenses in the upper row, left-eye lenses in the lower row, lid beside it

R+1.50 R+2.00 R+2.50 R+3.00 L+1.50 L+2.00 L+2.50 L+3.00 Frame Lid · MEDIUM +1.5 to +3.0

RRight-eye lensLLeft-eye lens Closed box: max 3 cm high, to fit through a letterbox.

Project overview

Summary of the request.

Product: Reading glasses where the user removes and fits each lens individually.
Range: Eight strengths, +0.5 to +4.0. Sold in three gift boxes: LIGHT, MEDIUM and STRONG.
Each gift box: One frame and eight lenses: four strengths, left and right.
Provided by us: Product concept, 3D concept model, packaging suggestion and this brief.
Requested from you: Technical solution, samples, production and quotation.
Fixed requirement: Closed gift box max 3 cm high.
Open for your proposal: Lens attachment method, materials, dimensions, tooling and packaging construction.

Scope of work

Development

Propose and develop a solution for attaching and releasing each lens.

Samples

Prototypes of frame, lenses and gift box for testing and approval.

Production

Frame, lenses in eight strengths and three gift box variants.

Quotation

Unit price at 1,000 / 5,000 / 10,000 sets, tooling cost and lead time.

Background

Each eye often needs a different strength.

Ready-made reading glasses have the same strength in both lenses. Many users need a different strength in each eye, and their need changes over time. Today they compromise, buy several pairs or buy prescription glasses.

Reading glasses from the front, with a different strength in each lens

Product concept

One frame. Lenses changed one at a time.

The user removes a lens by hand and fits another strength from the gift box. The frame should look and feel like ordinary reading glasses.

Intended use

Changing a lens.

By hand, in a few seconds, without tools.

The open gift box with frame and eight lenses — 01Open the boxEach strength has a labelled place.

A hand removes a lens from the frame — 02Remove the lensReleased by hand.

Two fingers pick a new lens from the box — 03Select a strengthTaken from its place in the box.

The new lens is fitted into the frame — 04Fit the new lensA clear click when in place.

Functional requirements

Requirements for the lens attachment.

1
Individual change
Each lens can be removed and fitted on its own, by hand, without tools.
2
Secure fit
The lens must not come loose during wear, cleaning or transport.
3
Clear field of view
Nothing in the field of view. The glasses look like ordinary reading glasses.
4
Clear feedback
The user feels a distinct click when the lens is in place.

Concept example: translucent frame showing a thin ring around the lens, hidden magnets and small pins — Concept for reference: a thin ring around the lens, magnets in the frame and small locating pins.

Line drawing: one lens pulled out of the frame, with an arrow showing it clicks in and out, held by magnets in the frame

Packaging

Three gift box variants.

Each box holds the frame and four strengths, left and right. The boxes overlap by two strengths, so a buyer between two boxes can choose either.

Max 3 cmThe only fixed requirement: the closed box may be no more than 3 cm high, so it fits through a letterbox.

LIGHT

+0.5 – +2.0

+0.50+1.00+1.50+2.00

Frame + 8 lenses (4 strengths, left and right)

MEDIUM

+1.5 – +3.0

+1.50+2.00+2.50+3.00

Frame + 8 lenses (4 strengths, left and right)

STRONG

+2.5 – +4.0

+2.50+3.00+3.50+4.00

Frame + 8 lenses (4 strengths, left and right)

The design shown is a neutral suggestion: natural paper and a moulded insert where every lens has its own place, labelled with its strength. Materials and construction are up to the manufacturer.

Reference images