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Bifocal Semi Finished Lens Blanks , Flat Top CR39 1.499 Ophthalmic Blanks
Home » Products » Semi Finished Lens » SF Bifocal Lens » Bifocal Semi Finished Lens Blanks , Flat Top CR39 1.499 Ophthalmic Blanks
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Bifocal Semi Finished Lens Blanks , Flat Top CR39 1.499 Ophthalmic Blanks

  • Semi Finished Bifocal
  • Aogang
  • 9001509900
  • 1.499
  • 70/28mm
  • CR39
  • 58
  • 1.32
  • > 97%
  • UC
  • Base: 2/4/6/8 ADD; +1.00~+3.50
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Technical Data

1.499 S/F FLAT TOP BIFOCAL BLANKS

MARTERIAL REFRACTIVE INDEX=1.499                                                                                                                    TOOLING INDEX=1.530
Diameter(mm) Nominal
Curve
Front
Radius
T.C Back
Radius
BACK
T.C
CT/ET Frong sag
Ring 50mm
RX Range
Recommended
ɸ70 200B 234.27 2.26 94.93 5.58 10.0/14.0 1.34 -5.25Dto-8.00D
ɸ70 400B 127.62 4.15 94.93 5.58 10.0/12.0 2.47 +2.00Dto-5.00
ɸ70 600B 87.18 6.08 161.04 3.29 9.0/6.0 3.66 0.00Dto+4.00D
ɸ70 800B 66.49 7.97 161.04 3.29 13.0/6.0 4.88 -4.25Dto+6.00D

 

Bifocal Semi Finished Lens Blanks , Flat Top CR39 1.499 Ophthalmic Blanks


Product Features

Bifocals have the unique ability to give two lens powers so that you can see both near and far. The bottom portion of the lens is used for seeing up close like with reading or computer work. The top portion is for distance but some people do not need it so sometimes that portion has no prescription in it at all. It will vary with each person.

 

  • As their name suggests, bifocal eyeglass lenses have two lens powers — one for distance and one for near.

 

  • The lower half of a bifocal lens contains the near segment for reading and other close-up tasks. The rest of the lens is usually a distance correction, but sometimes has no correction at all in it, if you have good distance vision.

Bifocal Semi Finished Lens Blanks , Flat Top CR39 1.499 Ophthalmic Blanks

 

Bifocal Semi Finished Lens Blanks , Flat Top CR39 1.499 Ophthalmic Blanks
  • When people inch closer to forty, they may find that their eyes are not adjusting to distances as they used to, the lens of the eyes begin to lose flexibility. It becomes difficult to focus on close objects. This condition is called presbyopia. It can be managed to a large extent with the use of bifocals.

  • Benefits of flat top bifocal lenses for wearer:


a. Two different segment sizes to meet individual requirements

b. Reduced reflections due to curved segment top

c. Segment fusing or molding on front surface and inner toric surface design ensure excellent optical quality and cosmetically attractive lenses

d. Wide selection available: various material, photochromic bifocal lenses and sunglass lenses

e. Aogang bifocals are made from one of the highest quality materials, in Uncoated, Hard-Coated and Hard-Multi-Coated varieties.


Contact Us

contact us

QUICK LINKS

CONTACT

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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