Q: The terms of optical frames fitting.
A: Size of frame
The numbers on your frame appear to be a code to crack a secure. Frame sizes are measured in millimeters and so are written out because lens size, bridge size and temple length. An example of a frame dimension is 48 x 22 x 145. What this means is the lens dimensions are 48 mm, the bridge is 22 mm plus the temple, the part that goes over your ear, is 145 mm long. Frame manufacturers determine the scale for each style and in most cases make several sizes in each style.
Thickness of lens
"Coke-bottle" lenses is a very common term people use to spell out thick eyeglass lenses, most opticians try to keep from using it. A lot more nearsighted or farsighted you are, the thicker your lenses. Nearsighted, or myopic lenses are thicker with the edges and farsighted, or hyperopic lenses are thicker inside the center. Lens material affects thickness. Plastic will be the thickest style of material for lenses; glass, polycarbonate and high-index lenses are thinner.
Height if bifocal
Bifocal height is definitely an optical dispensing term that is utilized to explain most varieties of lenses that have a couple of correction, or prescription, for distance or more-close. A normal bifocal is measured so the the top of bifocal rests on the fringe of the low lid. A trifocal or progressive, a multi-focal lens without lines, is measured higher, under the pupil. Opticians frequently talk about these as "bifocal" height likewise.
Distance if papillary
The distance relating to the pupils is important for eyeglass fitting because it tells the optical lab where to put the optical center of this lenses. This can help the thing is best through your glasses. "Pupillary Distance," or "PD" can be used for bifocal placement inside lenses.
Tilt of pantoscopic
Your face has curves, and your frame needs to match the curves to sit down properly and help you see as well as possible. Pantoscopic tilt, also called "panto" or "tilt," refers to the vertical plane of one's frame. Most frames should be adjusted to make sure they sit with the bottom on the lenses nearer to your cheeks along with the the top of lenses out and away from the forehead. The tilt is frequently very minor and follows the natural curve of the face. Frame fit is individualized, and pantoscopic tilt should be matched for your unique face shape.
How to adjust pliers for eyeglass frames?
- Model No: EM036
- Highlight: Latest Fashion Style
- Gender: Woman’s Eyewear
- Age Group: Adults
- Frame Size: 50-19-135
- Shape: Oval Eyewear
- Spring Hinge: No
- Color: Burgundy
- Available Color: Purple
- Material: Metal
- Tips: No
- Bridge: Adjustable nose pads
- Original: ShenZhen
- Rim: Nylon Spectacle
- Certificate: CE and FDA are certificated
- Warranty:1-Year Warranty.
- Availability: In Stock for Eyewear Distributor
- Payment Terms: Paypal, Western Union
- Minimum Order:12pcs/Model, 300pcs in total
- Market Preference: Asia Eyewear, Africa Spectacle Frame
- Eyewear Quote
- Package: 1pcs/Poly-bag, 12pcs/Inner Box, 300PCS/Carton
- Carton Box Size: 84*27*31
- Cross Weight: 12KGS
- HS Code: 90031900
- Delivery Time: Within 7 days upon received your payment