What glasses are suitable for presbyopia? Resin, pure glass, crystal, stone

First of all, are crystal glasses eye-catching? It is often said that wearing crystal glasses can make the eyes cool and comfortable, and have the effect of protecting the eyes.

In fact, crystal is a pure crystallization of natural quartz ore, when the light passes through the crystal stone to produce double refraction, in addition, because the transparency of this natural transparent body is not so high, so that the longer wave type of infrared and the shorter wave type of ultraviolet light are easy to be absorbed through, both of which can have a harmful effect on the eyes. Therefore, it is not recommended to wear crystals. The weight of the resin is light, and it is more economical and reasonable, but it is easy to produce scratches and blurs.

The weight of the glass is relatively heavy, it is easy to break, and it is not protected from ultraviolet rays. To sum up, it is recommended to go to the optical store for an optometry check-up, ask a few more stores, and do the shopping around.

In general, resin is used. Crystal glasses do not protect against ultraviolet rays and are not good for the eyes. If you have not had an optometry before, it is recommended that you have a first-time optometry, and if there is no obvious astigmatism in both eyes and the power is basically the same, you can buy finished reading glasses.

If there is obvious astigmatism, the power of the two eyes is obviously different, you need to customize reading glasses that fit your eyes, in this case, buying reading glasses can not achieve the ideal state, people will have such and such problems from time to time, and the effective time of glasses will be shorter.

White crystal glue flowers.

There are mineral profiles that coexist in white crystal.

It's a man-made synthetic, and it's harmful for people to wear. Remember not to wear it.

This is made with resin and aluminum powder for crafts.

This can be had. High-quality reading glasses from +100 to +400 degrees with pure natural white crystal.

The material of the frame:

1.Natural material - tortoiseshell frame, mainly made of tortoiseshell shell, can generally be made of the frame tortoiseshell takes hundreds of years, it is characterized by: weight key light and rotten, very durable, will not be allergic; And the color is bright, there are eight kinds of amber, golden yellow, subyellow, gray dark color, brown spot color, brown red color, dark spot color, and dark cloud color.

2.Metal materials - mainly copper alloy, Monel alloy, nickel-chromium alloy, memory alloy, stainless steel, gold frame, platinum frame, etc.

Copper alloys are made from a mixture of copper and other metals. There are mainly zinc, white copper, brass, copper-nickel-zinc-tin alloy, bronze, nickel-copper alloy, etc. Monel alloy is a highly corrosion-resistant alloy and is generally used as a material for medium and high-end mirrors.

Nichrome, also known as the new alloy, is silvery-white in color. Memory alloy with superelasticity. Titanium alloy is an ideal frame material.

Pure titanium frame, elastic, wear-resistant and corrosion-resistant. K gold frame is a frame made of gold alloy. Platinum rack, platinum is a white metal that is heavy and expensive.

3.Plastic materials - mainly acetate frames, according to different production processes, divided into plate frames, injection frames.

Material of the lens:

Glass lenses, plastic lenses, crystal lenses, PC lenses (Note: Lenses can be divided into lenses for correcting vision, myopia, farsightedness, astigmatism, presbyopia, prisms, eye protection lenses, tinted lenses, bright light leakage lenses, UV absorbing ultraviolet lenses, etc.) according to their uses).

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The glass is fine, but the resin must not be rubbed with anything!

I used this method to wash the lenses, and the lenses in August 2006 have been used until now (there is not a single scratch, and there is no detachment.)

Step 1: Rinse the lenses with water so that there are water droplets on the lenses Step 2: Squeeze a drop of dish soap on your fingers (I use white cat, lemon flavored: d) and apply it evenly to the lenses with your index finger and thumb.

Step 3: Rinse off the dish soap from the lenses with a gentle stream of water.

At this point, you will notice that the lenses are as clean as new, but there are residual water droplets on them.

Never wipe it with a tissue or mirror, the correct way is:

Step 4: Fold the paper towel into a small tip and wash off the water.

Finish! The dish soap is very safe, and it will never cause corrosion to the lenses when rinsed, and the owner of the eye shop near us uses the cleaning liquid prepared by the dish soap.

As for the stone lenses, the hardness of natural crystals is already very high, but they are easy to break, so you can handle them with care.

There is basically no need to worry about scratching the lenses.

1. Maintenance of resin glasses:

Plastic glasses are easy to wear and tear because of their low hardness, so you should pay attention to dust and scratch resistance. Of course, it is best to use lens paper to wipe glasses, and it is most convenient to use a lens cloth at ordinary times, and deerskin can also be used, do not wipe with handkerchiefs and other items, let alone use the corners of clothes or something.

Second, the maintenance of crystal glasses:

The hardness of the crystal is high, so you don't have to worry about the scratches of dust and dust. Just wash it regularly with detergent and you're good to go.

When maintaining plastic lenses, you should pay attention to the following: be sure to wipe them with a special cloth, and it is best to rinse them with water before wiping. If it gets oily, wash it with a little cleansing.

When wiping the lenses, you should use the lens cloth to wipe in one direction, gently replace the water, and do not wipe it very hard, which is easy to scratch the lenses.

Note: Do not use detergents that contain too much alkali.