J C Penney Optical (Santa Rosa, CA 95401-3570)

• How long will it take for transition lens to change color?

  Transition lens won't change the color quickly when they are under the sun. It will take them several minutes to change the color.

• Is it useful to use transition lens when working on a computer?

  Transition lens only change the color when UV rays hit its surface. Computer is often used indoors. So when you work on a computer with transition glasses, your glassess won't change the color and won't protect your eyes. You'd better get a pair of computer glasses for comupter use.

• How does transition lens change in the sunlight?

  The transition lens contains a substance which is called silver halides. This kind of substance will change the color according to the strength of the light.

• Is there a kind of glasses that can do the computer work and reading both?

  Computer bifocals can meet your both needs for computer use and reading. You can get them from your opticians.

• How to reduce the lighting glare from glasses?

  You can solve this by adding an anti-glare coating to your lenses.

• Can photochromic sunglasses be harmful to your eyes?

  The material in phtochromic lens is silver halides and it is harmless to your eyes. But it is not recommended to wear them too long. Your eyes may get tired as the pupil has to change as the lens color change.

• Can using eye drops everyday really protect your eyes?

  No. Using eye drops everyday will make your eyes relay on them. Most eye drops contain anticorrosive which can cause eye diseases if you use eye drops everyday.

• Is it true that you should not wear contacts when getting a cold?

  Yes. When you get cold, your eyes will get infected and some germs are easy to develop in your eyes. If you wear contacts, the germs will spread to your contacts. Then your eyes may feel really uncomfortable or get irritated while wearing them.

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