Semi Finished Lens, Lens Blanks for RX Lab
Index: 1.49, 1.56, 1.59, 1.60, 1.67, 1.74
Coating: UC, HC, HMC, SHMC
Base Curve: 0, 50, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000

What Semi Finished Lens Blanks Can do?

Spectacle lenses production units that transform semi-finished lenses into finished lenses according the precise characteristics of a prescription.

The customization work of laboratories enables us to provide a wide variation of optical combinations for wearer needs,

especially as regards the correction of presbyopia. Laboratories are responsible for surfacing (grinding and polishing)

and coating (coloring, anti-scratch, anti-reflective, anti-smudge etc.) the lenses.

What is a freeform lens?

"A freeform lens normally has a spherical front surface and a complex, three-dimensional back surface which incorporates the patient’s prescription. In the case of a freeform progressive lens, the back surface geometry includes the progressive design. The freeform process utilises semi-finished spherical lenses which are readily available in a wide range of base curves and indices. These lenses are accurately machined on the back side using state-of-the-art generating and polishing equipment to create the exact prescription surface.

• the front surface is a simple spherical surface

• the back surface is a complex three-dimensional surface

Technology for freeform lenses

• Provides the flexibility to offer a wider range of high level products, even for the smaller optical laboratory

• Only requires a stock of semi-finished spheres in each material from any quality source

• Lab management is simplified with significantly fewer SKUs

• Progressive surface is closer to the eye - providing broader fields of view in the corridor and reading area

• Accurately reproduces the intended progressive design

• Prescription accuracy is not limited by the tooling steps available in the laboratory

• Accurate prescription alignment is guaranteed