Q: I just had lasik 11 days ago. I have 2 questions. Will smoking marijuana damage my eyes, and will vomiting damage my eyes. (Like from the pressure or something). Thank you, Jennifer A: Smoking marijuana can lower the pressure in the eyes. In rare cases, this can result in a mild undercorrection, which might require a touch-up procedure. Vomiting should not damage the eyes. Andrew Caster, MD.

Q: Does the use of contact lenses help in stabilizing power more than glasses? A: Some doctors believe that the use of gas permeable contact lenses, particularly during the pre-teen and teenage years, may stabilize the eyes at a lower amount of nearsightedness. It is not clear whether this is true or not. Andrew Caster, MD www.castervision.com

Q: My power is -13. When I wear glasses I have headaches, but when I put contacts, I don't get them. What is the reason? And will it get cured by LASIK/ICL? A: Glasses with that high of a prescription often cause distortion around the edges, which can cause headaches. This does not happen with contacts, or with Lasik or the ICL. For this prescription, the ICL might be the best choice. Andrew Caster, MD www.castervision.com

Q: I have a very high prescription. I am -6.50 and -15.50. I was told that because my cornea thickness were 523 and 492 I was not a candidate for Lasik. My doctor recommended something called a Verisyse because the vision in my right eye was so bad along with the cornea issue. What can you tell me about this particular surgery and is it worth trying or should I wait for something else comes out that might help. I am 38 years old. A: The Verisyse, or a different lens called the Visian, might be good for your -15.50 eye. For the other eye, Lasik is an option. There is a lot of information on the web about these options. My website, www.castervision.com, has lots of information. Andrew Caster, MD

Q: Hi, Can you recommend a good surgeon or clinic that does new custom Lasik in the Las Vegas Nevada area. Thanks A: It is not appropriate for me to answer this type of question on this website. Andrew Caster, MD www.castervision.com

Q: I am near sighted and would like to have Lasik Eye Surgery done. However at my consultation today, the doctor expressed concerns that he thinks I might have Keratoconus in my one eye. He explained the risks for having the Lasik surgery done if I do have this condition, but said I still can get it done if I'd like. Can you give me any advice or your thoughts on what you would do? Thank you, Kate Patton A: I would get a second opinion from a reputable lasik surgeon. If you have keratoconus, then you do not want to have the procedure, because that can result in unpredictable results. Andrew Caster, MD www.castervision.com

Q: I am just starting to research LASIK surgery and believe I would be a good candidate (eyes at -2.75 and -2.50, no dry eye other than with contacts and extensive computer work or dry climate conditions, etc.). However, I noticed that you recommended that someone who boxes should not have LASIK. I am a scuba diver. Would the occasional salt water in the eye, being at depth, or pressure on the eyes be a problem after surgery? Thank you A: Scuba diving is not a problem for Lasik. Boxers should have the Lasik without the flap (PRK). Andrew Caster, MD www.castervision.com

Q:  I have rumathoid arthritis and my arthritis specialist (doctor) said that it is affecting my eyes.....My eyes get red,pain ,pinch,and it has affected the vision in one eye. My eye doctor said after a 1 hour exam, several tests and interview that I have no disease,no illness,no reason he can relate to my problem.. Can a Lasik surgeon HELP ME !!! PLEASE ADVISE A: Rheumatoid arthritis patients will often have problems with the eyes. They should avoid Lasik unless their condition is very mild and very much under control. Andrew Caster, MD www.castervision.com

Q: Is it possible to have Lasik performed 3 times if your cornea is thick enough. 525 microns script is OD -.50 - .50x OS -.75 x .25, Last procedure was done 6 months ago. A: There is no problem with having these repeat Lasik treatments, in the rare event that they are needed, if the cornea is thick enough. Of course, there is the small risk of infection, or folds in the flap, every time that you lift it. Andrew Caster, MD www.catervision.com

Q: Is 11 days enough time to go without wearing my soft contacts - they are not extended wear, before the actual lasik surgery? The doctor told me 11 days is enough. A: Usually that is enough. In rare cases longer may be necessary. Andrew Caster, MD www.castervisin.com