Q: Can your dominant eye change from one eye to the other with lasik surgery. A: Yes, the dominant eye can change. Dominance in the eyes is not as firm as handedness. Many people only show minimal or even no dominance with the eyes, and it certainly can change. Andrew Caster, MD www.CasterVision.com

Q:  I was diagnosed with having keratoconus 7 years ago. Recently, I have started to wear gas permeable contact lenses (less than 6 months). While they do help me to see much clearer, my eyes are very sensitive. Mainly to light and wind. I do experience (eyebrow) glare, especially during night driving and if the wind blows while I'm outside, my eyes will tear excessively. Plus I suffer with seasonal allergies. Would I be a good candidate for corrective laser eye surgery? For which type? Why or why not? Thank you. A: Lasik is best avoided in people with keratoconus. Lasik without a flap can be performed, but the keratoconus will still progress, and there is some concern that Lasik without a flap may cause more rapid progression in some cases. We really don't know for sure. So I would recommend against laser vision correction at this time. Andrew Caster, MD www.CasterVision.com

Q:  I am 23 years old, and have had a lazy eye since my mom noticed it at about 10 months old. I have not taken care of the problem and it has been untreated for about 10 yrs. My left eye is the lazy eye and when closing my right eye all I see is severely blurred vission. I suffer from realy bad headaches everyday,dizziness and nausea. I feel my condition getting worse. Is there any surgery to correct the problem or so that my left eye could move left or so that I dont look cross eyed. Thank you. A: You need to be evaluated by an ophthalmologist to determine if there is treatment for you. Andrew Caster, MD

Q:  Hello: I have a dry eye condition that has successfully been treated with a single punctal plug in each eye. I've heard that Lasik will dry the eyes (for some amount of time after the procedure). Will my condition exclude me from being a candidate for Lasik? If so, are there other vision corrections options I can persue (my vision eyeglass prescription is fairly mild). Thanks, Mark A: Lasik can make the eyes more dry in some people, at least temporarily but sometimes on an ongoing basis. Lasik without a flap seems to have much less effect upon dryness, so that might be the better option for you. Andrew Caster, MD www.CasterVison.com

Q: I had cataract surgery in 1992. My vision at distance (beyond reading length) is blurred, and I use prescription eyeglasses to see clearly when driving or playing golf. I would like to be able to see a golfball hit a green @ 150 yards. Can lasik accomplish this? A: Yes, assuming that the other parts of your eye are healthy. Andrew Caster, MD www.CasterVision.com

Q: What does the number mean in regards to your corneas? After my exam, I was told my number was low - indicating a thin cornea - They didn't explain what that meant. A: Some people have thicker corneas, some have thinner ones. If your cornea is too thin, then laser vision correction is not an option. Andrew Caster, MD www.CasterVision.com

Q: I am planning to go into the US Army in about a year. I do not want to worry about having glasses on while doing different activities, since no contacts are worn in the army. A: Many, many people in the armed services have had Lasik or Lasik without the flap (PRK). Andrew Caster, MD www.CasterVision.com

Q: I am 20 years old and I want to know if I can have LASIK surgery. I have astigmatism. A: You need to be evaluated by a Lasik specialist. One of the issues for a 20 year old is that it is best to wait until your eyes have stopped changing. Sometimes this happens at age 15, but sometimes not until age 25 or so. Andrew Caster, MD www.CasterVision.com

Q: Is there any way at all to change the color of one's eye through surgery or any other way? Recently I have heard that there are eye drops that can change the color of one's eye. Is this possible? A: There are glaucoma eyedrops that can change the color of the eyes in some people, but this is an unwanted side effect. There are no drops to purposefully change the eye color. Andrew Caster, MD www.CasterVision.com

Q: How long do the results of lasik last for? I have friends and coworkers who have had lasik performed several years ago. A couple of them still see great, but a couple of my other friends say that their perfect vision is slowly fading. One friend had lasik performed 3 years ago but needs to wear glasses again when driving. What causes the results of lasik to fade away? A: Lasik will not stop the eyes from any naturally occurring changes that they are programmed to develop. Therefore, we want to wait until the eyes stop changing, as they often do, in the teenage years and which can sometimes continue into the twenties. Sometimes people in other age groups will experience a change in their vision, which Lasik cannot stop. Also, Lasik will not stop the loss of near vision (presbyopia) that occurs in midlife for which people use reading glasses. Andrew Caster, MD www.CasterVision.com