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Prescription Glasses

 

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Answers to your frequent questions

Myopia is a refractive problem that comes up when the patient sees distant objects blurred. This is due to the fact that the image is formed in front of the retina as the cornea, the crystalline or both are very powerful, or because the eye is longer than normal. The magnitude of this defect is measured in negative diopters (-).

Hyperopia is a visual focus problem that usually comes up with blurred and uncomfortable nearsighted vision. In this case, the diameter of the eye is smaller or shorter than normal, or the cornea is too flat. The magnitude of this defect is measured in positive diopters (+).

Astigmatism is a visual problem that occurs when, due to an irregularity in the curvature of the cornea, images of objects (both near and far) appear as blurred and deformed. This is due to the fact that the cornea, instead of being round and having the same curvature over the entire surface, is flattened by the poles and different curvature’s radii appear in each of the main axes.

No, myopia and hyperopia are contrary refractive problems and cannot occur together. It can happen that one eye is short-sighted and the other one is hyperopic, but never both in the same eye.

The lens thickness is determined by your diopters. There are no prescription rules about whether a lower or higher index is needed or not, it is also an aesthetic issue greatly influenced by the size and shape of the frame you have chosen.

If you have high diopters, we will surely recommend choosing a extra-high lens index and a frame that is not too big: keep in mind that myopia lenses are concave, that is thicker at the edges and thinner in the center, so: higher the diopters, the greater the thickness of the lenses’ border. If you choose a suitable frame we can reduce the sensation of minification in how others see our eyes through the myopic lenses.

Yes, just send them to us. If you’d like to use this service, please write at hola@greyglasses.com and our optometrists will check your diopters and your interpupillary distance in order to manufacture the very same lenses for the new frame.

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Don't let them fool you: prescription glasses are a health product, not a luxury.

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