Name: 1.56 Index Flat Top Bifocal Vision Prescription Eyeglass Lenses
Brand: Crystal Optical Co.,Ltd.
Price: 20 USD
Rating: 4.4 (5 reviews)

1.56 Index Flat Top Bifocal Vision Prescription Eyeglass Lenses

This design allows the wearer to switch between near and far vision on a pair of glasses, ideal for presbyopia or people who need to switch vision frequently.The index is also higher than CR39 lens.

Features of 1.56 Index Flat Top Bifocal Vision Prescription Eyeglass Lenses

Division of visual area ‌ : There is a sharp division between the upper single-lens lens for looking far and the lower bifocal lens for looking close. The height of this boundary should not be lower than the pupil high line to ensure that the line of sight can naturally pass through the boundary when the near and far vision is switched to avoid visual discomfort.

Comfort and smoothness ‌ : Flat-top bifocals are designed to ensure that wearers remain fluid and comfortable when switching visions. Through personalized adjustment, the height of the boundary can be set according to the individual's pupil height, face shape and usage habits, thus providing a better wearing experience.

‌Appearance and functionality ‌ : The optical center is closer to the top of the child, reducing the appearance of jumping. However, the appearance of the flat-top double light is not as hidden as the dome double light, and the manufacturing requirements for the column mirror are higher.

Specification of 1.56 Index Flat Top Bifocal Vision Prescription Eyeglass Lenses

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Index	1.523
Material	NK55
Diameter	70/28mm
Power Range	SPH -6.00~ +6.00
ADD	0~ +3.00
Abbe Value	33.8
coating	HC/HMC/SHMC
Coating clour	green
Design	Flat Top

Advantages of 1.56 Index Flat Top Bifocal Vision Prescription Eyeglass Lenses

Flat Top Bifocal lens: there is a clear flat small lens for near vision correction, the appearance can see the clear dividing line.

Invisible Bifocal lens: through a special optical design to achieve near and far vision correction, there is no obvious dividing line in appearance, more beautiful.