Dr. Serene Ngin, OD

• Do sunglasses in dark tinted color give more UV protection than the light color?

  No, the UV protection has nothing to do with the tinted color. Dark sunglasses can only offer you a mild view when in bright light but they don't absorb more UV rays.

• Why do I have eye strain when using computer?

  When you do too much work on computer, it will make your eyes tired. What's more, when you concentrate on the computer, you often blink less, which will make your eyes easy to dry out. So you often get eye strain when using computer.

• How to choose frames that fit my face?

  To choose a good frame that fit your face, the try on process is very important. You should make sure that the nose pads fit snugly against the nose so that the glasses don’t slip, and that the temples fit the ear closely.

• How to choose proper lens according to different prescription?

  Your prescription is not so strong. People who have prescription strength from -300 to -500 can choose the 1.56 to 1.59 lens, which can fit your power properly.

• How can I get free eye exam?

  If you are U.S. citizens and legal residents, you can get free eye exam from EyeCare America which is a public service program of the Foundation of the American Academy of Ophthalmology.

• Can anyone know the symptoms of presbyopia?

  The early sign of presbyopia is that you can't see close up things such as reading. If you are over 40, it is possibly that you have got presbyopia. Other symptoms include eyestrain, headaches or feeling tired from doing up-close work.

• Do sunglasses with 100% UV protection are much more expensive than other sunglasses?

  No. That whether sunglasses have 100% UV protection has nothing to do with the cost. Some cheap sunglasses which are labelled with 100% UV protection can also give you 100% protection from UV rays. So when you choose sunglasses, just check the label to see whether they have 100% UV protection.

• Are UV levels in the high mountain higher than in the lowland?

  Yes, you will be exposed to more UV rays when in the mountain. The UV rays will increase by 6% to 10% when the altitude increase 1000 meters. So you should have full protection when climbing mountain.

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