Name: Spectacle Lenses 1.56 Blue Block UV410 Round Top Bifocal Optical Lens
Brand: Crystal Optical Co.,Ltd.
Price: 20 USD
Rating: 4.4 (5 reviews)

Spectacle Lenses 1.56 Blue Block UV410 Round Top Bifocal Optical Lens

The Round Top bifocal lens is a specially designed eyeglass lens characterized by a slightly curved dome design at the upper part of the lens ‌. It is suitable for people who need protection against blue light.This design provide a wider view and a more comfortable wearing experience who need to observe distant and near objects frequently. Partner with Crystal Optical for top-quality OEM/ODM services as your preferred blue block lens supplier.

Features of 1.56 Blue Block Round Top Bifocal Lens

Design features

No obvious dividing line
Arc structure: This design helps to improve the stability and comfort of the lens.

Functional features

Double correction function: Round Top bifocals can achieve double correction of farsightedness and nearsightedness on a single lens, providing great convenience.

Anti-blue light

Effectively block harmful blue light , reducing its potential photochemical damage to the retina

Specification of Spectacle Lenses 1.56 Blue Block UV410 Round Top Bifocal Optical Lens

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Index	1.523
Material	NK55 UV420
Diameter	70/28 mm
Power Range	SPH:-6.00+6.00, ADD: 0+3.00
Abbe Value	38
Coating	HC / HMC / SHMC
Design	Round Top

Contrast of Bifocal Lens Types

The difference between round top bifocals and flat-top bifocals in the method of determining the machining reference line and the apex of the sub-lens, as well as the suitable eye distance. The difference between the invisible bifocal and the other two is its appearance, the invisible bifocal fuses the small lens in the large lens, and there is no obvious boundary between the size of the lens, which does not affect the appearance. However, this design will also lead to the inevitable phenomenon of image jump and image defect