MICHAEL / Lens & Optical Guides
Bifocal (Round-Top & Flat-Top 1.56) vs. Progressive Lenses Guide
Compare MICHAEL’s 1.56 Round-Top and Flat-Top Bifocal specifications against seamless no-line Progressive multifocal lenses.
MICHAEL OPTICAL · LENS & OPTICAL GUIDES
Bifocal (Round-Top & Flat-Top 1.56) vs. Progressive Lenses Guide
Compare MICHAEL’s 1.56 Round-Top and Flat-Top Bifocal specifications against seamless no-line Progressive multifocal lenses.
Shop all 17 EM frames (US$25.70)1. Confirmed 1.56 Bifocal Specifications (Round-Top vs. Flat-Top)
Under MICHAEL’s confirmed multifocal schedule, lined bifocal lenses are grouped within our Multifocal / Progressive division in 1.56 Mid-Index resin with two purpose-built segment geometries:
| Bifocal Style | Refractive Index | Primary Visual Distance & Use Case | Supported Coatings & Lens Functions |
|---|---|---|---|
| Round-Top Bifocal (圆顶双光) | 1.56 | Mid-distance & near vision: Ideal for office meetings where you alternate between viewing a large conference-room PPT screen and reading near-distance documents. | Standard Base Coating (Green AR / Super-Hard / Wear-Resistant), Blue-Light Filtering, Photochromic, and Sunglasses (UV400 Tint or Polarized). |
| Flat-Top Bifocal (平顶双光) | 1.56 | 50 cm desktop distance & near vision: Ideal for office desk work where you alternate between a computer monitor at ~50 cm and reading books or files up close. | Standard Base Coating (Green AR / Super-Hard / Wear-Resistant), Blue-Light Filtering, Photochromic, and Sunglasses (UV400 Tint or Polarized). |
2. How lined bifocals compare with no-line progressive lenses
| Feature | 1.56 Round-Top & Flat-Top Bifocals | Progressive Lenses (1.56 to 1.74) |
|---|---|---|
| Viewing zones | 2 distinct zones: Upper mid/distance area plus a dedicated lower near-reading segment (Round-Top or Flat-Top). | 3 continuous zones: Far distance, intermediate (computer/dashboard) and near reading in one seamless corridor. |
| Cosmetic appearance | Visible segment line across the lower portion of the lens. | Completely seamless, line-free surface identical in appearance to single-vision lenses. |
| Available indices | 1.56 Mid-Index across Standard, Blue-Light, Photochromic and UV400/Polarized Sun. | 1.56, 1.61, 1.61 Pro, 1.67 and 1.74 (Clear from US$60/pair). |
How to order your preferred multifocal option
You can configure No-Line Progressive Lenses (Clear starting at US$60/pair; Driving from US$32/pair) or Readers & Prescription Reading Glasses (starting at US$5/pair) directly in our 5-step online lens selector. If you specifically want a 1.56 Round-Top or Flat-Top Bifocal applied to your order, simply contact MICHAEL Support with your frame choice and prescription to confirm pricing, prescription suitability and Round-Top or Flat-Top segment placement before ordering. Bifocals are available by enquiry.
Frequently Asked Questions
What is the difference between Round-Top and Flat-Top 1.56 Bifocals at MICHAEL?
Round-Top 1.56 Bifocals pair mid-distance room viewing (like conference PPT screens) with near document reading, whereas Flat-Top 1.56 Bifocals pair 50 cm desktop computer distance with near book and file reading.
Which lens coatings and functions are available on 1.56 Bifocals?
Both Round-Top and Flat-Top 1.56 Bifocals support Standard Base Coating (Green AR / Super-Hard / Wear-Resistant), Blue-Light Filtering, Photochromic, and Sunglasses (UV400 Tint or Polarized).
Should I choose a 1.56 Bifocal or a No-Line Progressive lens?
Choose a No-Line Progressive (Clear from US$60 in 1.56; Driving from US$32 in 1.50) if you want seamless far-to-near vision with no visible line on the lens; choose a 1.56 Round-Top or Flat-Top Bifocal if you prefer a distinct two-zone office/reading segment.