Archived posting to the Leica Users Group, 2000/12/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I think it depends on which procedure, and which machine along with the size of your cornea. I had the Lasik procedure which involves cutting through the cornea, pealing it back, reshaping the cornea with the Laser and repositioning the flap of cornea. The surgeon knows the coverage of his laser and measures your cornea before hand. They can then tell you in advance the probability of that form of night vision problem. The older procedure (PRK) had a higher occurrence of the halo effect. I enjoy my Leica (on topic) much more since the surgery. Ken - -----Original Message----- From: Tom Schofield [mailto:tdschofield@email.msn.com] Sent: Wednesday, December 20, 2000 10:46 PM To: leica-users@mejac.palo-alto.ca.us Subject: Re: [Leica] Beware laser surgery & Night Vision Sounds like a good soft focus effect for portraiture. Tom > My other avocation is astronomy, and I have read about laser surgery causing rings around bright objects at night. I asked a very good eye surgeon about this. He explained that typical laser surgery only corrects the central portion of the cornea. He said that when your pupil dilates at night you use the outer rim area, and this remains uncorrected, hence the ring effect. He said he could cut the cornea, lift it up, do a correction to the edge, and stitch it back. I said no thanks.