A 28mm curved top or flat top bifocal is a good general-purpose choice for a first-time user with the C28 having the edge in terms of adaptability, cosmesis and jump. Professional drivers may prefer a smaller C25 or D25 seg to facilitate peripheral distance vision when using door mirrors or …

This article explains everything you need to know about bifocal lenses which are a type of multifocal lens. Learn about their history and origins, the different types and their uses, as well as the pros and cons of this particular lens.

S28 and C28 | Standard These lenses are available in addition from +0.75 to +4.0. The near part consists of a classic segment (see image). S28 Xact and C28 Xact have fully optimised optics in all directions due to calculations based on frame parameters. S28 | HIGH ADD Bifocal design with addition from +4.5 to +6.0 in steps of 0.5.

2021年7月29日 · Curved-top Bifocals: It also known as C-seg bifocals, the upper dividing line of the near segment is curved like C. Available seg width are- 22, 25, 28, 40. OC lies 4.5 mm below the seg top. Cosmetically appealing, image jump lesser. Panoptic Bifocals:

Bifocals: for presbyopic patients. Bifocal types: Split bifocal- separate lens bonded together (Franklins Split) Solid bifocal- made from a single medium then add power coming from extra shape of segment; Cemented bifocal- segment bonded into main lens

C28 curve top bifocal. This bifocal segment is in the shape of the letter C with a slight upward curve at the top of the segment. Less light is reflected from the segment top, therefore cosmetically more appealing than flat top segments.

This bifocal lens features an excellent total balance of such properties like index, abbe number and specific gravity.

Our Free Form single vision lenses are suitable for all styles of frames. Bifocal lenses are divided into two parts to accommodate a combination of any two different prescriptions into one lens. One area of the lens will have one prescription (usually distance) and a segment in the lower half will have the other (usually near vision).

This Bifocal C28 segment option is up to 45% slimmer and lighter than standard 1.5 index lenses and is an excellent option if your prescription has a sphere value over +/- 5.00. It has all the benefits of the Anti-Glare option lens but with the added special features listed below .

This dual functionality makes bifocal lenses an excellent choice for individuals with presbyopia, allowing them to see clearly at multiple distances without the need for multiple pairs of glasses. Our Bifocal lens ranges include the following segment shapes: C28, C35, D28, D35,R24,R28,E-executive and digitally fused bifocal.