Difference between revisions of Severe myopia
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Learn to recognize the symptoms[https://www.nhs.uk/conditions/detached-retina-retinal-detachment/]: when retinal detachment does happen, fast intervention and treatment can rescue you from losing sight in an eye. | Learn to recognize the symptoms[https://www.nhs.uk/conditions/detached-retina-retinal-detachment/]: when retinal detachment does happen, fast intervention and treatment can rescue you from losing sight in an eye. | ||
== | ==Avoid heavy glasses== | ||
The front of minus lenses is flatter than the back, which is curved more strongly. In the center, minus lenses are typically only about 1.5mm thick (thinner would make the lenses too fragile), but moving away from the center (optical axis) the glass becomes thicker. The more minus the diopters, the larger the difference in curvature, and the thicker the edge of the lenses. | The front of minus lenses is flatter than the back, which is curved more strongly. In the center, minus lenses are typically only about 1.5mm thick (thinner would make the lenses too fragile), but moving away from the center (optical axis) the glass becomes thicker. The more minus the diopters, the larger the difference in curvature, and the thicker the edge of the lenses. | ||
When choosing a normal frame with regular diameter lenses, you will end up with very thick lens edges and hence uncomfortably heavy glasses that easily slide off your nose and look ugly. What to do? | When choosing a normal frame with regular diameter lenses, you will end up with very thick lens edges and hence uncomfortably heavy glasses that easily slide off your nose and look ugly from the side. What to do? | ||
===Choose frames with small-diameter lenses=== | ===Choose frames with small-diameter lenses=== | ||