Wednesday, April 24, 2013

PRK Journal, Week 7

There hasn't been much change in the last couple of weeks.  Each eye still has some ghosting, a second faint image above and to the right of the main image.  This is the result of astigmatism, which is an asphericity of the cornea which prevents it from focusing a single image precisely on the retina.  In the Day 6 report I mentioned a test at the doctor's office which involved looking through a pinhole and seeing a clear image, in contrast to what was still very blurry vision sans pinhole.  That's an astigmatism test.  The pinhole takes away any ghost images because only a small part of the cornea is getting an image in the first place.  

At any rate, the astigmatism and resulting ghosting should go away as the cornea continues to heal.  In other PRK recovery accounts I've read, ghosting starts to go away in week 5 or 6.   However a factor in my case may be the use of steroid drops, whose purpose is to slow healing down.  Others report that they see noticeable improvement in vision when the steroid drops are discontinued.  Frequently that's a month or two after surgery.  For whatever reason, my doc has me continuing the drops for four months after surgery.  Four drops per day the first month, three the second (where I am now), etc.  So my improvement may be correspondingly slower.  There's no reason yet to worry that it won't arrive at the right place eventually.





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