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FT-28 Transition Bifocal Semi Finished Lens Blanks Anti Reflection Coating 1.56 Index
Home » Products » Semi Finished Lens » SF Bifocal Lens » FT-28 Transition Bifocal Semi Finished Lens Blanks Anti Reflection Coating 1.56 Index
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FT-28 Transition Bifocal Semi Finished Lens Blanks Anti Reflection Coating 1.56 Index

  • Semi finished Photochromic Bifocal
  • Aogang
  • 9001509900
  • 1.56
  • 70/28mm
  • NK55, imported from Japan
  • 42
  • 1.15
  • > 97%
  • UC, HC, HMC
  • Base: 2/4/6/8 ADD; +1.00~+3.50
Quantity:

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Technical Data

1.56 Semi Finished Photochromic FT-28 Lens(Brown/Gray)

Material: 1.56 Index Resin(Ne=1.56, Abbe=42, Specific Gravity=1.15)

Segment Placement=5mm down~5mm in

Add Power: +1.00 to +3.50 in 0.25D steps

Segment Size=28mm

FT-28 Transition Bifocal Semi Finished Lens Blanks Anti Reflection Coating 1.56 Index

 

CONVEX SURFACE CONCAVE SURFACE


Mominal Curve True Curve

Sag

(sagitta: 40mm)

Radius Radius CT(mm) ET(mm) Dia(mm)
1.549
2.00






70
4.00 4.17
1.50 131.74 132.50 8.0 8.0
6.00 6.35
2.30 86.45 88.80 8.0 7.0
8.00







Product Features

1) How Do Bifocal Lenses Work?

 

Bifocal lenses are perfect for people suffering from presbyopia- a condition in which a person experiences blurred or distorted near vision while reading a book. To correct this problem of distant and near vision, bifocal lenses are used. They feature two distinct areas of vision correction, differentiated by a line across the lenses. The top area of the lens is used for seeing distant objects while the bottom part corrects the near-vision.

FT-28 Transition Bifocal Semi Finished Lens Blanks Anti Reflection Coating 1.56 Index

 

2) Benefits of Photochromic Lenses

 

  • They are highly adjustable to varying lighting conditions in indoor and outdoor environments

  • Protect your eyes from harmful UVA and UVB rays of the sun

  • They eliminate the use of separate prescription glasses as they are suitable for most frames and prescriptions

  • Photochromic lenses are versatile as they can be enhanced using additional treatments like anti-glare coating and scratch-resistance coating

  • Can be used by both adults and children

  • Since they are distortion free, they can be worn in rains

  • Ideal for everyday use

 

FT-28 Transition Bifocal Semi Finished Lens Blanks Anti Reflection Coating 1.56 Index

 

3) Why Choose Photochromic Flat Top Lenses?

 

----Our Flat Top 28 Bifocal Photochromic lenses are manufactured using the same high quality NK55 material(imported from Japan) as our standard lenses, with ultraviolet filter and scratch resistant coating. Flat Top 28 Bifocals provide you with clear, sharp distance and reading vision.

 

----FT-28 Photochromic Lenses contain light-sensitive molecules that darken and lighten according to the intensity of ultraviolet light. Recent advances in Photochromic technology ensure that they perform consistently across a wide range of temperatures and climates.

 

----The greater the intensity of the UV rays, the darker the lens becomes. The moment the UV rays are no longer present, the lens begins to fade back to almost clear. Photochromic Lenses do not change while driving in a car. All Photochromic lenses come with 100% UV protection.


Coating Choice

The most important benefits of anti-reflective (AR) coating may be the unseen advantage–relief from fatigue and eyestrain caused by glare. AR does have a big cosmetic advantage, but removing the distracting reflections and ghost images that contribute to eyestrain clearly is a bigger benefit. Being more comfortable in anything we do is a benefit, especially when wearing glasses.

 

FT-28 Transition Bifocal Semi Finished Lens Blanks Anti Reflection Coating 1.56 Index


Contact Us

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Add: East Of Nongganxiao, Situ Town, Danyang City, Jiangsu Province, China

Tel:+86-511-86550315
Phone No: +86 18796035231
Fax: +86-511-86555316
Email: admin@ag-optical.com.cn
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