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Frame Height Contour:
Our target corridor length of the progressive lenses co-relates big time with the frame style and size to ensure that no vision range on the lens surface shares a conflict point with one another. Likewise, PD is also essential in measuring the right contour of the lenses. This measurement also paves an ideal way to achieve the total area dedicated to the reading vision range seamlessly.
Vortex Distance:
Vortex Distance demonstrates the eyes declination intercept with the designed lens surface. It is essential to measure the vertex distance depending on the length of the corridor. For longer ones, the vertex distance needs to spread out while the shorter corridors represent a closer vertex distancing from the area holding the vision range.
5 Most Common Fitting Issues With Progressive Lenses!
Scenario
- Your reading area is narrow.
- You have to lift your head or glasses to read.
- Your distant vision is slightly blurry.
- You move reading material off to the side for better focus.
- You lower your head or glasses to read at a distance.
SOLUTION
- Check your fitting height and
PD measurements.
- Decrease fitting height.
- Widen up the nose pads.
- Have your lenses remade with
the correct PD measurements.
- Adjust the frames to sit higher
on your face.
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