Q: My right eye is a -3.75 -3.75 and the cornea thickness was at 520 is that thick enough to do lasik and not prk. The cornea is healthy.   A: In most situations, that is thick enough to perform Lasik. Andrew Caster, MD

Q: I'm a -12 and -13 in each eye. What would the best thing for me to get done? My vision is getting worse. What do you recommend? A: If your vision is getting worse, then you should wait until it has stopped changing. You are at the upper limit for laser vision correction, and should consider looking into the phakic intraocular lenses. Andrew Caster, MD

Q: Hi, I have been using power glasses/contact lens since childhood. My number is SPH: (-)8 & CYL: (-) 1.75. The doctor says I am not a suitable candidate for LASIK since my cornea is very thin. What do you suggest? Regards, Asad S. A: For people with thin corneas, the Lasik without the flap, also known as PRK or Advanced Surface Treatment, is often an option. the other option, which is more invasive, is the phakic intraocular lenses, also known as the intraocular contact lens. Andrew Caster, MD

Q: I had RK surgery done in 1990. Can I still have lasik done? I'm both near and far sighted. Thanks, Ed A: Yes. Andrew Caster, MD, FACS

Q: Dear Doctor, I have uveitis disease and I want to know if I can have Lasik surgery or any other type of vision correction to see without glasses (I can't see far distances).Please help me. Best Regards, Shiva A: Laser vision correction would only be possible if your uveitis has been mild and has been under very good control lately. Andrew Caster, MD

Q: I had lasik surgery August 06. There is some dryness to my eyes and floaters. When is it safe to use sunbeds? Thank you. A: It is safe to use sunbeds if you protect your eyes. Andrew Caster, MD

Q: Dear Dr. Caster, I just want to know what anti-reflective coating on glasses is made of and is it completely safe? Is there any health concerns with these coatings? Thanks. A: There are no health concerns about using anti-reflective coatings on glasses. The coatings can be easily scratched, so you should not touch them. The only possible health concern would be if the material were ingested. Andrew Caster, MD

Q: I have a thin cornea of 520 micron and my left eye is -10.00 and my right eye is -12.00. And my pupil size is 5mm. I am 45 years old. Can I have any type of Lasik at all due to my thin cornea and high prescription? If not, is monovision an option for me? A: Your corneas are not particularly thin; it is just that your prescription is on the high side. You are a candidate for the PRK version of laser vision correction, and monovision is certainly an option. Andrew Caster, MD

Q: Hello Doctor. My question: If I have LASIK or any other treatment to correct my condition of myopia (2.0 and 2.25) will I then lose some of the acuity of my near vision? I have always felt that I have excellent near vision, ie. in my house I was always the one asked to thread the needle, and I do a lot of reading. Will I need reading glasses after this procedure? A: People who are nearsighted and are not wearing glasses or contact lenses will usually have excellent near vision, unless they also have a fair amount of astigmatism. After your treatment, your near vison will be like it is with distance glasses or contact lenses on. Andrew Caster, MD

Q: Dear Dr. Caster, I had lasik done 1 year ago. I think I was slightly overcorrected. My vision is around 20/30. Can the surgeon fix this problem to get a patient back to 20/20. Thanks. A: Yes. Andrew Caster, MD, FACS