CurtPalme.com Home Theater Forum

ecrabb · Posted: Fri Feb 28, 2014 4:39 pm Post subject:

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Yeah, the "non-correctable" bit is pretty damn scary.

I have pretty bad astigmatism and I've considered getting LASIK for years. Even if I didn't get to 20/20, I figured it would be worth it just to reduce the astigmatism. (Astigmatism is a directional distortion in your cornea. You have to align the corrective lens at the correct angle to get proper correction. At my level of astig I need the lens aligned within one degree or so, or I get eyestrain. And that's tighter tolerance than most glasses-making places try for. Worse, your eyes "self-level" if you tilt your head -- but your lenses don't. So any time I tilt my head, my vision blurs and I get eyestrain. Sucks.)

But I was never brave enough to risk the complications. Now that I'm in my late 50's, I've started having a bit of trouble with chronic eye infections (blepharitis). My eye doc confirmed that I should **never** have LASIK with this condition, and it's a good thing I didn't do it already.

Slicing and frying your cornea is a dicey proposition. It usually works out OK, but not always. And like SC said, for those of us who are fussy about our vision, it's just not a good idea.

Spanky Ham · Joined: 22 Mar 2006 Posts: 5643 Location: Comedy Central

Gary,
My astigmatism is a 120 axis in my right eye with a -.75 cylinder. Not sure if this is bad or not. My eye doc said my right eye was much worse than the left.

You guys make some good points about Lasik, but it still seems to work out for a lot of people.

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

-0.75 is pretty mild. Mine is -2.50 in one eye and -3.75 in the other.

Lasik works for a lot of people. A lot of people aren't that fussy about sharp vision. And it sucks bigtime if you happen to be one of the unlucky ones who it DOESN'T work out for. The odds are very good but it's still Russian roulette if you lose.

paw · Joined: 08 Mar 2006 Posts: 1176 Location: Arvada, CO

LASIK was the best thing I've done. My only issue was dry eyes for a few years. Only a little more than when I worn contacts. Now I can slap on a pair of sunglasses or goggles and go for a bike ride or ski. Also, I probably worn up with reading glasses a little soon. A reasonable trade off for me.

Spanky Ham · Joined: 22 Mar 2006 Posts: 5643 Location: Comedy Central

Did you get wavefront or regular Lasik?

paw · Joined: 08 Mar 2006 Posts: 1176 Location: Arvada, CO

Spanky Ham · Joined: 22 Mar 2006 Posts: 5643 Location: Comedy Central

Interesting. It is said that the success rate is much higher with wavefront or custom Lasik as opposed to regular Lasik.

CIR Engineering · Posted: Sat Mar 08, 2014 8:33 pm Post subject:

CIR Engineering · Posted: Sat Mar 08, 2014 10:29 pm Post subject:

I ordered two pair, couldn't resist.

craigr

Spanky Ham · Joined: 22 Mar 2006 Posts: 5643 Location: Comedy Central

I hope it didn't break the bank! Smile

I have been wearing my general glasses for night vision and especially driving. They have really helped. I was out last night and tested with and without. With the glasses on, this girl I was staring at looked normal. Without the glasses, she looked washed out like a pj image with the lights on.

CIR Engineering · Posted: Mon Mar 10, 2014 7:53 pm Post subject:

Yeah, I spent a whopping $75 on a pair of rimless glasses and another half rim style. I got the anti-glare coating so I am looking forward to getting them.

craigr

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Just weird I saw this thread as I took my contacts out to clean and put my Glasses on I never wear. I have massive CA !!!!!

I need to try the CR39 lens. I am not sure what these are. got them from Americas best over a year ago and can't find the paper work.

Nashou

Spanky Ham · Joined: 22 Mar 2006 Posts: 5643 Location: Comedy Central

I haven't really tested them, but I haven't noticed any CA.

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Nashou, they're almost certainly some high-index plastic. The optical places really push the high-index, apparently not caring that it totally hoses the CA for anyone with a strong prescription. I doubt CR39 would have "massive" CA no matter how bad your prescription is.

CIR Engineering · Posted: Tue Mar 11, 2014 2:25 pm Post subject:

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Yeah, now that you mention it, I remember complaining years ago about "blue on one side, orange on the other" fringes to my *ophthalmologist* and he had no idea what I was talking about. Maybe he's not an expert in lens materials but by God he ought to understand optics. And he SHOULD understand lens materials, since his office dispenses glasses too.

The optician places think high-index is the answer to everything. It's lighter, thinner, better scratch and UV protection, so of COURSE it's better for all people. They apparently assume all lenses have perfect optics so that's not even considered. (And the fact that the high-index lenses are more expensive never enters into the equation I'm sure...) The lens manufacturers must make a fortune on the high-index plastics because they sure push 'em hard. You have to make a special request to get CR39 and lots of times you'll encounter a tech who has no idea what you're talking about.

That's why I became a bit of an expert myself. I have to manage my eye care or incompetents will manage it for me.

Spanky Ham · Joined: 22 Mar 2006 Posts: 5643 Location: Comedy Central

It is funny you say that, Gary. With the online companies (at least the ones I have looked at), the default is CR39.

CIR Engineering · Posted: Tue Mar 11, 2014 9:28 pm Post subject:

Zenni defaults to like a 1.57 or so index and that lens is "free." You can also opt to downgrade to CR39 at no additional charge. Your eyebuydirect defaults to 1.5 index and the 1.57 is an upgrade that they "highly recommend." Needless to say, I did not opt for the upgrade Smile

but I did add anti-glare.

craigr

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

No one here had any idea what i was talking about either Craig, they all said its normal on all glasses, yet none of them could actually understand what i was refering to. I said colours out of alignment, they said no that doesnt happen with our glasses.... Laughing