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RALPH RA7018 » HAVANA/PINK DEMO

RALPH RA7018

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Lens Diameter 52 mm

Bridge 17 mm

In Stock:
No
Prescription Ready:
Yes
Lens width:
52 mm.
Bridge:
17 mm.
Genre:
Unisex
One Size:
Yes

RALPH
RA7018
HAVANA/PINK DEMO (599)
Talla: 52 - 17

Parameters
Left Eye
Right Eye
Sphere (SPH) help
Cylinder (CYL) help
Axis (AXI) help
Pupillary Distance (PD) help  
Lens Types
help
help
help
help
Lens Coatings
help
help Lenses Recommended for 1.67 and 1.7
Photocromatic Lens (Transitions) help
HELP FOR PRESCRIPTION GLASSES
 
The prescription you have for your glasses cannot be used to buy contact lenses. The parameters for contact lenses can only be determined in consultation with an optometrist or ophthalmologist.
 
What does each parameter mean in the purchase of prescription glasses?
 
Sphere (SPH) is the measurement in dioptres (D) of the spherical power of a lens. Normally, lenses are graded in increments of 0.25D.

  • If the measurement of spherical power is preceded by a negative sign (-), the lens is concave and corrects myopia (nearsightedness). Concave lenses are thicker along the edges and thinner at the centre.
  • If the measurement of spherical power is preceded by a positive sign (+), the lens is convex and corrects hyperopia (farsightedness). Convex lenses are thicker at the centre and thinner along the edges.

Cylinder (CYL) is the measurement in dioptres (D) of the cylindrical power of a lens. The CYL parameter applied to a prescription lens corrects for astigmatism. If you do not have astigmatism, the boxes on your prescription corresponding Cylinder (CYL) and Axis (AXIS) should be specified as 0 (the default parameter).
 
Axis (AXIS) is a parameter filled out in a prescription with CYL to provide the necessary lens values to correct for astigmatism.
AXIS values range from 0 to 180 degrees.

Anti-reflective coating allows for clearer vision. The coating covers the lens with a series of anti-reflective layers that allow almost all light to pass through the lenses, thereby eliminating most glare and reflection. The coating is recommended for all prescription glasses.

Mid and high-index lenses are more comfortable and fashionable than standard lenses, due to their reduced thickness and weight. Additionally, when a prescription is particularly strong, mid or high-index lenses are necessary, since the required thickness of a standard lens would make it impossible to fit properly into the frame.

Available colours

 Ralph RA7018

In Stock!

535 - BROWN/CREAM

 Ralph RA7018

In Stock!

541 - BLACK/TRANSPARENT

 Ralph RA7018

599 - HAVANA/PINK DEMO

 Ralph RA7018

876 - FCHSIA/WHITE/VIOLET

 Ralph RA7018

877 - BROWN/YELLOW/RED

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