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In the spring there is a need for sunglasses. Ultraviolet waves UVA and UVB, can affect the development of diseases such as cataracts, retinal detachment, blurred vision, aging of the skin around the eyes, etc. How do you choose glasses with the right lenses? To protect yourself from any troubles associated with the negative influence of the sun?
How to choose sunglasses
For the production of glasses, 2 types of material are used: organic glass and plastic.
The glass retains ultraviolet rays well, does not distort visibility and is quite resistant to minor scratches. But this material is very fragile, so it is not suitable for everyone.
Plastic lenses are very common and are used by almost 90% of manufacturers. If plastic glasses are of high quality, then they can have such properties as:
- impact resistance,
- be lightweight,
- have anti-static and anti-glare protective properties.
If the plastic is not of high quality, then soon there will be scratches, all kinds of damage, distortion of objects and space.
How to check your sunglasses
You can check whether the lenses change the outlines of objects in the following way – take the glasses in your hands, pull it out and direct the optics to a straight line (table edge, window frame).
Look through the prism of the plastic to see how jagged the line will be. The absence of changes in objects is a guarantee of the quality of the lenses.
How to choose the color of your sunglasses.
Dark gray, brown and black are the most optimal lens colors. They are safer for the eyes, practically do not distort and evenly transmit light waves.
Yellow is ideal for jogging in the park. It will provide minimal blackout and depth of vision. It is especially pleasant to wear glasses with yellow lenses in cloudy weather.
It is better not to wear pink and blue-violet colors for a long time, they have no positive effect.
Shading should be distributed evenly across the lens. If the shading is done with a sharp transition, then the eyes will be very tired. For vacationers at sea and for drivers, polarizing glasses are well suited, they additionally remove glare.
Sunglasses size.
Sunglasses should completely cover your eyes, only then they protect your eyes from ultraviolet radiation as much as possible.
The shape of the frame can be any, the main thing is that its upper border corresponds to the eyebrow line.
When fitted correctly, the frame will not create a feeling of pressure on the bridge of the nose.
