short sighted

I have been short sighted for a long time, since I was in my teen years. I watched the interest of laser eye surgery with interest but I have never taken up the option. This is for a few reasons:

• Initially I was concerned with the long term effects. Although the doctors said that there were no reasons for worry, until the actual experience is gained, there is too much uncertainty and my eyes are important.
• Wearing corrective glasses has never bothered me.
• I knew that eyes change continuously over time. So initially I become more and more short sighted. Originally I expected this to occur for a time and then stabilize. But I have found that it did this, then got worse again stabilized again and so on. I think I have been through this for about three cycles. When you get older, the eyes tend to become longer sighted again. This was believed to be caused by the mussels in the eye relaxing and stretching as they become older. This mean that even with the surgery there seems to be good reason to expect to have to wear glasses again.

I was asked the other day about the effect of bifocals on all of this. Do a bit of reading, it would seem that is it a realted effect, but there was not enough knowledge I could find to make a call. Bi focals are requred becuase of a condition called presbyopia. This seems to be a limit the the closet range that you can see. I suppose if you are short sighted then this would be less of an issue. Though recently I have noticed that I am having difficulty focusing at close range with my glasses off. But I do not know the cause of this effect.

I will do some more reading when I have more time and see if I can come up with a better answer on this latter question.