Q: Hello, I would like to know whether there is a possible way to change your eyes color. Is there any? Could someone change the color of their eyes or otherwise reduce/degrade their eye pigment? I look forward to hearing from you as soon as possible. A: There is no safe way to change your eye color at this time. Andrew Caster, MD

Q: One doctor said I shouldn't wear my contacts 3 days before going in for them to measure my eyes and do the consultation (PRK - my cornea is too thin for the newer Lasik) - another said I should wear my glasses for 2 weeks and then go in - another said only 24 hours. This has me nervous - what is correct??? I wear disposable soft lenses 24/7 - I throw them away after 2 weeks and put new ones in. A: There is no absolute agreement within our profession as to how long people should stay out of their contacts. For extended wear users, I take the more conservative approach of 10-14 days without the lenses. Andrew Caster, MD

Q: Hello doctor! I have a question regarding the eye sight of my father and I would appreciate if you would be able to help me with this. About 6 years back my father was unable to clearly see with both his eyes. He could see black spots and was unable to clearly see the persons standing in front of him. For example if he was looking at the face of a person, he would only see the persons shoulders except the face. We did approach an Ophthalmologist who recommended that we go through a Lasik treatment and it would be cured, but after the Lasik treatment, the eye sight worsened and now his vision has deteriorated and he can only see blurred images. I would like to know if there is a treatment for this? Would appreciate your help or any recommendations. Thanks and have a great day! A: It is necessary to know what the medical diagnosis of his problem is. There are many different conditions with different treatments that could be cause of his problem. Andrew Caster, MD

Q: Hello - I had a consultation for LASIK with a surgeon yesterday. He said that I am a good candidate and the only "word of caution" is about my flat corneas. He said that there is a chance that I may have problems with night vision. He also recommended traditional vs. custom LASIK. Any advice? Also, do you know any statistics on patients with Flat cornea in terms of night time vision? Thank you in advance. Sue S. A: There has been some concern that flattening the cornea beyond a certain range could result in some decrease in the quality of the vision, particularly at night, but this is not known for sure and is in fact debated. Andrew Caster, MD

Q:  I am told I have 6.5mm pupils with myopia of -3.75 (cylinder 0.5 diopeter) in my left eye and -4 (cylinder 0.25 diopeter) in my right. Corneal thickness is aprox 552 in my left eye and 538 in my right. I am considering treatment using Intralaze (for corneal flap) and a "Wavefront-optimised" ("Alegretto") lazer. However, having read about "Wavefront-guided" laser supposedly giving better all round results including night time vision and contrast sensitivity I don't know if I should be considering this instead...especially as I have most problems driving at night whilst currently wearing contact lenses. I don't care about the cost so much as my eyesight. Which alternative is likely to be better for my prescription? A: Wavefront-guided and wavefront-optimized give fairly similar results in the average patient. For patients with larger amounts of higher order aberrations, the wavefront-guided is superior. Andrew Caster, MD

Q: How long does your newfound vision last after LASIK surgery? If you do not need an enhancement, does your vision last forever? I've been told that it only last about 10 years, and you have to have it done again. A: The results of the Lasik procedure are permanent. However, Lasik will not stop your eyes from any changes which they would have undergone in the future without the Lasik. But once you reach your early 20s, it is unusual to have changes in your distance vision. Andrew Caster, MD

Q: The lens in my right eye was damaged when I was 4 years old and I have had very poor vision in that eye since. I am 53 years old. Since I am basicaly blind in my right eye, is it safe to have Lasik on my left eye for reading purposes? Thanks, Steve A: I would suggest that you don't have lasik. Most experts suggest against this elective procedure when you have only one functioning eye. Andrew Caster, MD

Q: Sir, Does an eye transplantation overcome the problem of night blindness? A: There is no eye transplantation that can be done. There is corneal transplantation, in which the cornea (the clear window in the front of the eye) is taken from a deceased donor and sewn into the eye, replacing the exisiting damaged cornea. This typically will not cure night blindness. Andrew Caster, MD

Q: I am writing on bahalf of my aunt. She is in Pakistan 15 years ago, she has lost her vision and she has diagnosed with optic nerve atrophy when she was pregnant. At her labour the blood preasure was so high, so at that time she started to lose her vision slowly. Slowly, one by one eye. I am wondering if her condition is treatable or not or do you think it is kind of glaucoma or something else. Please reply to me. I will be very thankful to you Or refer me to somewhere else where she can be treated. Suleman A: Sadly, I think there is no treatment that could return your aunt's vision. Andrew Caster, MD

Q: Sir, I am very much suffering from high power and night blindness. Is it possible to cure night blindness through LASIK? A: Sometimes, wavefront lasik can improve the night vision. However, I would never promise that to a patient. Andrew Caster, MD