Go Offices (San Francisco, CA 94110-2415)

• What is the difference between lasik surgery and PRK surgery?

  With a full name of Laser In-Situ Keratomileusis, LASIK is usually performed to correct myopia, hyperopia and astigmatism. Among all of the surgeries, only LASIK cuts a corneal flap during the surgery. LASIK uses a laser to apply the corneal tissue under the flap. In this way the corneal surface can be reshaped. In other words, a necessary amount of corneal tissues are removed. Until now, LASIK is the most popular vision eye surgery among the public. PRK (Photo Refractive Keratectomy) is another popular choice. This procedure is also capable of curing nearsightedness, farsightedness and astigmatism in mild and moderate forms. PRK involves no corneal cutting. During a PRK surgery, a laser delivers cool pulses of ultraviolet light directly on the cornea. During this process, the corneal surface will be reshaped. As a forerunner of LASIK, PRK is also a popular option today.

• How to get rid of red marks over nose with glasses?

  You could try applying some lotion or baby powder to the bridge of your nose before you put on your shades. This helps because the lotion or powder forms a barrier that helps to reduce the friction and pressure of the nose pads against your skin.

• Can the eye doctor know the vision distortion is caused by astigmatism or cataracts?

  It is quite easy for the doctor to tell as they are quite different things. You can see cataract through the pupil because it is a physical change in the lens of the eye, while astigmatism are caused by light refracting. They can't be confused.

• Which will look better, full color sunglasses or gradient tinted?

  I think it should depend on how you look on them, but I think gradient tinted sunglasses are more fashionable and the arrangement makes the wearer more at ease by enjoying the better sunshade as well as the better vision acuity seeing through the lower part.

• Can I save my daily disposable contacts if I only wear them half day?

  It doesn't matter if you wear them for another 5 hours in the next day. I have worn daily contacts for two days without any issue. But they are made to be thrown away at the end of the day, You are risking your eye health by doing this. If you are unlucky, you may get infected. So be careful with it.

• What's the main use of gradient tinted sunglasses?

  Gradient tinted sunglasses are used for different purposes, ranging from pure fashion enjoyment to outdoor sports. A fashion tint usually blocks 10-20% of sunlight. Outdoor activities and daytime driving require related lens tints to have an intensity ranging from 70-80%. 90% tints are suitable for sports like climbing and snow skiing.

• Where can I get daily disposable contacts for astigmatism?

  Of course there are. They are toric lens and often come in 30 packs in a box. You can go to the nearby optical store and have a ask.

• What causes my upper lid to feel heavy?

  It may be caused by dry eyes. You can try to use some lubricating eye drops , and use it at least four to five times a day to see if it work. If you are still in doubt, it is best to see your optometrist.

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