Enlarger Lens

Enlarger Lens

Glasses with Colorful Lens Harms the Retina

A pair of glasses with colorful lens, a fashionable ornament, has become one of the fashionable elements nowadays. But is this colorful lens safe enough for you?

According to some research, wearing glasses with colorful lens for a long time has more harms than goods, indeed, especially for the old people. In general, people in the age over 45, should not wear this kind of glasses any more, or the rate of catching the glaucoma will become much higher. 

 

Some special materials with colors make the lens colorful. In daily, with the sun light changing, the materials, which give the lens attractive colors, will change at the same time. The daylight mainly contains ultraviolet rays and visible lights. With the colorful glasses, the visible lights are weakened and therefore pupils are in enlarged condition nearly all the time, which brings about abnormally more ultraviolet into the eyes. As a result, the eyes are hurt. Too much ultraviolet rays may make the pupils to lose their gloss and elasticity and cause the edema in cornea. Moreover, the crystal lens get hardened and calcification. Then it is the worse eyesight and some eye diseases, like the cataract. People allergic for ultraviolet rays wearing glasses with colorful lens are in the way to catch the inflammation in retina. At the worst situation, the eyesight will be damaged destructively.

For people in the age over 45, colorful glasses will be an enemy rather than a friend. The reason is that their eyes' capacity of adjusting is decreased day by day and they need enough light when reading books. The myopia people over 600 degrees must not wear colorful lens, which causes the degree increased.

In summer days, people in various colorful lenses are walking along the street. A pair of color glasses is seen as not only the shield for eyes but also the token in style. Unfortunately, the truth is the very contrary.

Therefore when choosing the colorful glasses, think twice. Colorful glasses are not suitable for everyone. For your eyes' health, do pay more attention to them in daily.

About the Author

Glasses Shop provides a great variety of discount glasses with high quality and fashionable designs. What's more, you can try all glasses on line and all your purchases are promised to free of risk. And now many prescription glasses and sunglasses with latest designs have arrived, so just choose one for your families or friends as gifts, they are sure to be impressed. If any of you have questions, please leave your suggestions in comment section.

Darkroom.I have a Kaiser enlarger which i bought second hand and have no instructions with it.My problem is?

i cannot seem to focus properly.The bellows are closed tight,yet it still needs to go a little further to achieve sharp focus.I am using a nikkor 50mm lens. Any advice would be much appreciated as would any help in getting some instructions for the enlarger.Cheers.

Ok Mr. Enlarger ... here are what you need.... download your booklet refaring to your enlarger model...

http://www.kaiser-fototechnik.de/en/service/anleitungen/4_3_index.asp

good luck

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