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General Astronomy >> General Observing and Astronomy

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csrlice12
Postmaster
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Reged: 05/22/12

Loc: Denver, CO
Lasik Surgery and on/off axis sharpness new
      #5674046 - 02/11/13 01:13 PM

Anyone else out there who's had Lasix surgery feel that on-axis is all we have anyways? Maybe due to the circular flap cut they made to the cornea? Even with my widefields, I have to move my eye or eyeball to keep the object sharp, once it moves a little, its not as sharp unless I look straight at it again. Astigmatism is not a problem for me according to the Eyedoc....Just curious if anyone else has had Lasik and how it affected their viewing....

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Gary Riley
sage


Reged: 12/01/11

Loc: White Bluff, TN
Re: Lasik Surgery and on/off axis sharpness new [Re: csrlice12]
      #5674369 - 02/11/13 04:27 PM

I've had lasik done in both eyes now for 10 years and it has affected by night vision a little. Mostly seeing stars with slight flares if not looking directly in central portion of eyepiece. I do have a little bit of astigmatism as well. Car lights and street lights can sometimes have a little bit of a "starburst" look to them. From what I have gathered this is one of the possible negative side effects from the procedure for some people.

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GeneT
Ely Kid
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Reged: 11/07/08

Loc: South Texas
Re: Lasik Surgery and on/off axis sharpness new [Re: csrlice12]
      #5674468 - 02/11/13 05:09 PM

Because of my hobby of astronomy, I have put off having this surgery done. I would be interested in hearing from others who have had Lasik.

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ahopp
sage


Reged: 05/24/12

Re: Lasik Surgery and on/off axis sharpness new [Re: GeneT]
      #5674543 - 02/11/13 05:57 PM

I had it done last year. Daytime is incredible, 20/15. I do get way to much star burst at night. Not sure what to do about it. Surgeon does not seem to care.

Tony


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David Castillo
Carpal Tunnel
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Reged: 09/09/06

Loc: Carmel Valley, Ca
Re: Lasik Surgery and on/off axis sharpness new [Re: ahopp]
      #5675929 - 02/12/13 02:02 PM

According to my opthamologist, the 20/15(and sometimes greater) results are intentional. It is typical for scarring to happen 3 or 4 years on down the line that will yeild a 20/20 healing effect. As time goes by the great near-vision will wane. Nigh vision starburst patterns on bright lights happen, but usually decrease with healing. He also told me that the best correction achievable with present technology is 1/3 of a wavefront accuracy. This would explain why he wears glasses.
-----
Dave


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ahopp
sage


Reged: 05/24/12

Re: Lasik Surgery and on/off axis sharpness new [Re: David Castillo]
      #5675944 - 02/12/13 02:15 PM

Is there eye wear that can reduce the starburst?

Tony


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csrlice12
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Reged: 05/22/12

Loc: Denver, CO
Re: Lasik Surgery and on/off axis sharpness new [Re: ahopp]
      #5675948 - 02/12/13 02:19 PM

Actually, I am about 5 years postop and have no starbursts, and in the daylight, everything is focused. I really only notice it while looking in an eyepiece. I can track it looking directly at it while it goes off the edge and its fine, but if I look ahead and it starts to move from the center, before it even gets to 50% to the edge, it looses sharpness/contrast, if I look right at it again, it's sharp and good contrast; so it's not the scope or the eyepiece..

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ahopp
sage


Reged: 05/24/12

Re: Lasik Surgery and on/off axis sharpness new [Re: csrlice12]
      #5676239 - 02/12/13 04:40 PM

Did you ever have the starbursts, and if so, how long before they went away?

Tony


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csrlice12
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Reged: 05/22/12

Loc: Denver, CO
Re: Lasik Surgery and on/off axis sharpness new [Re: ahopp]
      #5676255 - 02/12/13 04:46 PM

didn't have starbursts. Starbursts are usually from RKE (Pie shaped cuts using a blade) and not Lasik (Laser). With the Lasik, I had a "Halo" at night for the first couple of years before it faded away. But, like I've said, at 1X everything is fine, in the scope, on-axis is all I've got, at least I can "follow" the object off the edge. I will clarify that this only happens with planets, and not DSOs. DSOs show up fine......

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berobertsmd
super member


Reged: 09/28/09

Loc: Brandon, Mississippi
Re: Lasik Surgery and on/off axis sharpness new [Re: csrlice12]
      #5676953 - 02/13/13 02:12 AM

One of the main factors in what you're noticing is pupillary size. During the day, your pupil is small, so even if you glance "off axis" you're still looking through the central region of the cornea, where's there's the best correction and least scarring.
After dark, your pupil is much larger,so when your gaze is diverted to the side slightly, now your looking through more of the edge of the cornea, where the flap was made, and there is some scarring and distortion.
I bought my first Dob from a man who had early Lasik surgery. At night, his vision was great looking straight on, but he said he could see the flap edge otherwise.
Supposedly some of newer forms of Laser surgery can minimize some of these problems.

Edited by berobertsmd (02/14/13 01:14 PM)


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Quest
member


Reged: 04/23/12

Loc: Buford, GA
Re: Lasik Surgery and on/off axis sharpness new [Re: berobertsmd]
      #5677694 - 02/13/13 01:28 PM

Maybe I'm lucky because I got my Lasik surgery prior to getting my first telescope so I can't really comment on viewing prior to surgery vs. post-surgery. I can say it's the best thing I've done for myself in decades. I had terrible astigmatism and now, 5 years after surgery, still have 20/20 eyesight and could not be happier. I experienced a halo effect early on which gradually diminished and was completely gone within the first 8 months or so. Now, no more glasses and contacts or dry eyes and overnight camping at my dark sky location is so much better than camping with all my contact supplies.

Maybe I have some affects that are viewable through the eyepiece that wouldn't be there if I hadn't had the surgery but to me, everything looks great through the eyepiece.


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orion61

*****

Reged: 10/20/07

Loc: Birthplace James T Kirk
Re: Lasik Surgery and on/off axis sharpness new [Re: Quest]
      #5678358 - 02/13/13 09:07 PM

Star Burst used to be REALLY bad when I was in the optical business and got popular in the 80's, they used to take radial cuts to do the correction. A buddy who was very near sighted had one done and it ruined it for Astronomy in his dominant eye, he chose not to do the other, now one lens is thick and the other thin. HE SAIS THERE WERE A BUNCH OF RAYS LIKE BICYCLE SPOKES coming from stars.
I don't have Astigmatism so I just took one lens out of my old pair of glasses, eye relief doesn't bother me and I can read my handset, Walking well thats another thing..
If I were going to do it I'd have a good talk to the Operating DR before the surgery, and dont do the Dominant
eye first


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berobertsmd
super member


Reged: 09/28/09

Loc: Brandon, Mississippi
Re: Lasik Surgery and on/off axis sharpness new [Re: orion61]
      #5679431 - 02/14/13 01:08 PM

I agree with Orion61. Definitely discuss astronomy, the technique of diverted gaze, and you concerns of the effects of a dialated pupil at night with your surgeon.
If you happen to have a corneal specialist in your area, they would be most familiar with latest techniques.
IMO, I'd stay away from the "Lasik bargin mills", but would choose a local eye surgeon known to do Lasik surgery frequently. I would not want the surgeon who does 1 LASER procedure a month. Also agree in doing your non-dominant eye first, try it out, then do dominant later.


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REC
Post Laureate
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Reged: 10/20/10

Loc: NC
Re: Lasik Surgery and on/off axis sharpness [Re: berobertsmd]
      #5679555 - 02/14/13 01:57 PM

Try and search around for a complete in depth report on this subject that Sky & Telescope did back in 9/05.

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jturie
super member
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Reged: 11/19/12

Loc: Valley Forge, PA
Re: Lasik Surgery and on/off axis sharpness new [Re: REC]
      #5680037 - 02/14/13 06:39 PM

Best of both worlds for me. I was a monovision candidate, had Lasik on only the left (bad) eye to correct to better than 20/20. I observe with my right. I've stuck the left in the EP and seem to notice the same effects as others have mentioned in this thread.

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derangedhermit
Pooh-Bah


Reged: 10/07/09

Loc: USA
Re: Lasik Surgery and on/off axis sharpness new [Re: jturie]
      #5680099 - 02/14/13 07:34 PM

I used to have very sharp vision when my eye doc finally got the combination of power and prism / astigmatism dialed in, and used high-end lenses.

I then got LASIK on both eyes. It is convenient. My night vision is much worse, even wearing glasses, than before.


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csrlice12
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Reged: 05/22/12

Loc: Denver, CO
Re: Lasik Surgery and on/off axis sharpness new [Re: derangedhermit]
      #5680882 - 02/15/13 08:54 AM

Yes, a definite loss of night vision. Luckily not enough to affect night driving (at least I've not run over anybody....yet)

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Darenwh
Carpal Tunnel


Reged: 05/11/06

Loc: Covington, GA
Re: Lasik Surgery and on/off axis sharpness new [Re: csrlice12]
      #5681236 - 02/15/13 11:36 AM

I had it done about six months ago. It's been great for me. I do see starbursts at night still when driving but they are very limited in the scope. I do still use my wide field eyepieces for planets but as I follow the planets with my central vision I do not see any adverse effects from the surgery. Next week I will be going in to have my dominant eye touched up as my vision is currently 20/35 in that eye. One thing I can say is colors are much more intense since the first surgery, especially star colors. Prior to the surgery red stars were hard for me to see. Now they are easy. Double stars showed very little color rendition, now it stands out well. It's like my eyes were operating more like they were when I first got in the hobby in the very early 80's. If I had the chance to go back to before I had the surgery would I? Yes, yes, and yes again.

Oh, and night vision, when driving, is much improved as well. Even with the star bursts I still see far better into darker areas on the side of the road and have no issues seeing the road itself.


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derangedhermit
Pooh-Bah


Reged: 10/07/09

Loc: USA
Re: Lasik Surgery and on/off axis sharpness new [Re: Darenwh]
      #5682486 - 02/15/13 10:27 PM

Quote:

I had it done about six months ago. It's been great for me. I do see starbursts at night still when driving but they are very limited in the scope. I do still use my wide field eyepieces for planets but as I follow the planets with my central vision I do not see any adverse effects from the surgery. Next week I will be going in to have my dominant eye touched up as my vision is currently 20/35 in that eye. One thing I can say is colors are much more intense since the first surgery, especially star colors. Prior to the surgery red stars were hard for me to see. Now they are easy. Double stars showed very little color rendition, now it stands out well. It's like my eyes were operating more like they were when I first got in the hobby in the very early 80's. If I had the chance to go back to before I had the surgery would I? Yes, yes, and yes again.

Oh, and night vision, when driving, is much improved as well. Even with the star bursts I still see far better into darker areas on the side of the road and have no issues seeing the road itself.




I certainly won't question your personal experiences. I do wonder how well your prescription was fitted for glasses or contacts before the surgery.


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faltered
professor emeritus


Reged: 04/01/05

Re: Lasik Surgery and on/off axis sharpness new [Re: derangedhermit]
      #5687411 - 02/18/13 05:39 PM

Ive had my LASIK for 7 years. It was the greatest thing I have ever done. I did have astronomy observing problems for about 8-10 weeks - but after that everything is flawless.

The problems were the "halo" effect I would get on really bright stars. DSO's saw no change in the observations.

I would do it again in a heartbeat.


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