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Video
Technical Data
| 1.499 S/F SHORT CORRIDOR PROGRESSIVE 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 |
| ɸ75 | 200B | 337.35 | 1.57 | 87.17 | 6.08 | 7.0/13.0 | 0.93 | -6.75Dto-8.00D |
| ɸ75 | 400B | 149.54 | 3.54 | 104.6 | 5.07 | 7.0/9.0 | 2.10 | +2.00Dto-4.25 |
| ɸ75 | 600B | 90.95 | 5.83 | 104.6 | 5.07 | 10.0/9.0 | 3.50 | 0.00Dto+3.50 |
| ɸ75 | 800B | 67.16 | 7.89 | 87.17 | 6.08 | 9.5/6.0 | 4.83 | -4.25Dto+6.00 |
Features
Semi finished lens:
 | 1. Semi-finished lenses need to have high qualified rate in power accurancy, stability and cosmetics quality.
2. High optical features, good tinting effects and hard-coating/AR coating results, realizing the maximum production capacity are also available for a good semi-finished lens.
3. Semi finished lenses can reprocessing to RX production, and as semi-finished lenses, not just superficial quality, they are more focus on the internal quality, such as precise and stable parameters, especially for the popular freeform lens.
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Progressive lens:
Progressive lens, also called progressive addition lenses (PAL), progressive power lenses, graduated prescription lenses, and varifocal ormultifocal lenses, are corrective lenses used in eyeglasses to correctpresbyopia and other disorders of accommodation. They are characterisedby a gradient of increasing lens power, added to the wearer's correction forthe other refractive errors. |
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Like anything new, adjusting to progressives can be frustrating, but don’t worry. Here are a few tips that’ll have you seeing clearly all the time, at every distance, with one pair of glasses.
 | 1) Resist the temptation to switch back and forth to your old glasses—this slows down the process of retraining your brain to focus through new lenses. 2) Wear your glasses high on your nose, and close to your eyes to maximize the range of visibility through each lens. 3) Move your head, not your eyes. Point your nose directly at what you’d like to see and bring it into focus by moving your chin up or down. 4) Practice! Grab a magazine to read while watching TV. Going back and forth between the two is a great way to practice and to speed up your transition. |
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