Dr Daniel Weinstein (San Francisco, CA 94102-1800)

• Is it better to wear a slightly weaker glasses than your eyes prescription?

  Since you feel dizzy at closer objects with your original prescription, you should take your doctor's advice to wear a slightly weaker glasses which you can get used to quickly. Once my doctor suggested me wear weaker glasses that I can see more clearly than my original prescription. And I feel comfortable when I wear them all day now. So I think it is better to wear a slightly weaker glasses.

• Is there a machine taht can measure your prescription automatically?

  The eye doctor will give you a complete eye exam including the machine that he will use to automatically measure your prescription and the eye chart which he will combined with the machine to determine your accurate prescription.

• What is the maximum power to wear contacts?

  The custom RGP contact lenses can be made for degree as high as -20.00,but they are more thicker and expensive.

• What kind of cleaners are good to clean glasses with anti-glare coating?

  Aplly several drops of a mild dishwater detergent into the water and mix them up. Then soap your lenses into the water and gently rub your lenses with your finger. Finally, rinse your glasses under warm, running water and dry them with soft cloth. The mild dishwater detergent won't harm your lens.

• Can the Anti glare coating be added to the lens?

  Of course you can. You can take your glasses back to your optician where you bought your glasses. Their lab will add the anti-glare coating on your lenses. But it may be costly. You can contact your optician to determine whether they are willing to do it for you.

• Is it ok for children to wear anti-glare glasses?

  Children are able to wear anti-glare glasses if they do need. However, the anti-glare coating may be easy to get damaged because children are too careful and can't take good care of them.

• How bad can your eye prescription be if you are legally blind?

  Legally blind has nothing to do with the prescription numbers. Legally blind means that your best vision cannot be corrected with glasses or contact lenses any better than 20/200. A normal person with 20/20 vision can see objects clearly that is 200 feet away from him, while the legally blind person can only see the object clearly that is 20 feet away from him. A legally blind person can't see objects clearly that is very far or close.

• What are the advantages and disadvantages of anti glare glasses?

  In my opinion, anti-glare glasses can be used for night driving because they can reduce nighttime distortions so as to provide a clear vision for drivers. However, the anti-glare coating will add the weight to the lenses especially for the high prescription lenses, so people will find uncomfortable to wear them all day.

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