Walnut Square Optometry (Berkeley, CA 94709)

• Can I wear prescription sunglasses over prescription contact lenses?

  You'd better not, under this situationm the prescription will be added to a strong power which is relatively higher than that of your original power, thus to lead you to more serious vision problem. But it is OK to wear prescription sunglasses over non-prescription contacts or to wear non-prescription sunglasses over prescription contacts to add UV protection, fashion element and convenience.

• what kind of glasses can reduce eye strain when working on the computer ?

  Computer glasses are special glasses prescribed to lessen the symptoms associated with computer vision syndrome (CVS). CVS describes a group of symptoms caused by prolonged computer use. Symptoms appear because the eyes and brain react differently to words on a computer screen than they do to printed text. Symptoms often include eyestrain, dry eyes, headaches and blurred vision. Many people try to compensate for these vision problems by leaning forward or by looking down to see through the bottom portion of their glasses, often resulting in back and shoulder pain. Source:http://vision.about.com/od/eyeglasses/f/Computer_Glasses.htm

• Will it make a big differentce when wearing glass glasses or plastic glasses?

  Glasses optical clarity is the best and as such glass lenses will have little to no distortion.Adding to that, it is the most scratch resistant optical material.However, glass will almost certainly shatter on impact. Plastic lenses are mainly made from polycarbonate and CR-39 plastic material. Polycarbonate is popular for lenses because of its high resistance to impact. polycarbonate lenses also have the highest distortion compared to any other material. CR-9 is another type of optical plastic. It has little distortion compared to polycarbonate. It is thinner and lighter than glass too.plastic being a lighter material makes plastic lenses much lighter than glass and therefore they are less likely to cause indentations. Source:http://www.differencebetween.net/object/difference-between-plastic-and-glass-lenses/

• Should I get bifocal glasses or two separate glasses?

  It is decided by your own preference. For bifocal glasses, you need time to get used to them, because they have two centers with the upper part to see the far distance, with the lower part to see the near distance. For two seperate general wear, you have to change between those two pairs, it is not so convenient.

• Can I wear sunglasses at night?

  You can wear sunglasses at night even it is hard to look clear at night. These following are 5 reasons for you to wear sunglasses at night. 1)Most people wear them to look cool and nonchalant; 2) Some of them wear to hide the emotions in your eyes; 3) to intimidate and to play a trick on someone 4) for health reasons; 5) to hide from paparazzi, especially for stars and celebrities.

• Why can I buy reading glasses without a prescription?

  It is impossible for reading glasses without prescription. Reading glasses are some what magnifying glasses specialyy made for who spend a great deal of time and have problem concentrating on material close-up. Most reading glasses are made to a particular prescription,according to degree of myopia or hyperopia combined with astigmatism.

• Can the sea salt damage your eyes?

  Sea salt won't damage your eyes permanently. Just put sunscreen on your face skin before going out to sea, and wear a face mask over your sports goggles to prevent the splash of salty water from getting into your eyes.

• Can I go swimming with my contacts in?

  You'd better not.If your contacts fall into the water,I guess there is no way to find them out.

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