Post IOL patient sees green color through new lenses...

[Uncle Fester]

For the last year a post IOL patient has seen a light green color without glasses. His glasses (FT28 poly no AR) enhance the effect to a distinct green.

I troubleshot by first looking through the lenses to see if I could see it. Nope. Suggested he wear them which he has done for a year now. No better. Nobody else can see it.

Chalk it up to internal chromatic aberration and the pts is stuck?

Or is there any lens fix to this that I'm not aware of?

My Avance sample makes it worse.

[Hayde]

Fester, curious if you tried a 10-20% violet tint for this Px to look through? Might be worth a shot?


[Edit: Had to look it up...."Magenta" would be the proper reference, depending on the green in question. They say men only have a 1-bit color scheme. Our brains only really refer to 8 colors....] :P

This is a subtractive approach, so we're not doing total vision any favors...if a Px liked the results, I'd run it by the doc before running with it.

[drk]

Is he monocularly pseudophakic or bilateral?

[Robert Martellaro]

Is he monocularly pseudophakic or bilateral?

Or two different IOL materials, one acrylic and the other silicone, resulting in chromatic aberration.

[Paul Smith LDO]

U F, do you know if they used an accommodating IOL. These have been known to create some color changes in some patients; generally blueish. Perhaps the UV blocking.

[Uncle Fester]

drk- Bilateral

I'll ask about the other good questions.

Thanks!!!

[Uncle Fester]

Fester, curious if you tried a 10-20% violet tint for this Px to look through? Might be worth a shot?


[Edit: Had to look it up...."Magenta" would be the proper reference, depending on the green in question. They say men only have a 1-bit color scheme. Our brains only really refer to 8 colors....] :P

This is a subtractive approach, so we're not doing total vision any favors...if a Px liked the results, I'd run it by the doc before running with it.

I'll try this next time he stops by. Wonder if a Prevencia filter would help? Need a sample though. Can't say I've used it.

[Uncle Fester]

drk- Bilateral

I'll ask about the other good questions.

Thanks!!!

More details-

Post IOL Rx R +.75 -1.25 x90 L +.25 -.50 x80 add +2.00 Both eyes done within a month of each other.

With no glasses green is more muted. Through FT28 Poly- white background especially becomes notably more green. Maybe place a couple of 0.00 cr-39 over eyes to rule out material making it worse?

Color appears independently so different materials can be ruled out.

[Don Gilman]

I'll try this next time he stops by. Wonder if a Prevencia filter would help? Need a sample though. Can't say I've used it.

Why not tint a pair of plano's and hold them up.

[Hayde]

I'll try this next time he stops by. Wonder if a Prevencia filter would help? Need a sample though. Can't say I've used it.

Can't say I have either...first time I've heard of this symptom.

I think since Prevencia is reflective rather than absorptive, not sure that'd work. No harm in trying it though. (Tried it on myself here: think maybe it muted greens a bit, but so slightly it might be psychosomatic. :P )

Tinting a few disposable planos varying hues and strengths of purple might be illuminating for when you schedule his visit.

...I mean "Magenta."

[drk]

chromatopsia

Abnormal condition in which objects appear falsely coloured. Depending upon the colour seen, the chromatopsia is called xanthopsia (yellow vision), erythropsia (red vision), chloropsia (green vision) or cyanopsia (blue vision). This condition may appear after a cataract operation (blue and red vision) or following exposure to an intense illumination (red vision) or in people suffering from carbon monoxide poisoning and oxygen deprivation. This may cause some damage to the areas of the visual cortex involved in the processing of colour perception, because these areas are supplied with more blood vessels than other areas of the visual cortex. Syn. chromopsia. See euchromatopsia; xanthopsia.

[Hayde]

Thanks, Doc! [+1 in spirit since the 'ware won't let me]

I'm intrigued by the possibilities you, Robert, & Paul mentioned. Could the exact shade Fester's patient prefers be used to deduce the precise cause?

[Uncle Fester]

chromatopsia

Abnormal condition in which objects appear falsely coloured. Depending upon the colour seen, the chromatopsia is called xanthopsia (yellow vision), erythropsia (red vision), chloropsia (green vision) or cyanopsia (blue vision). This condition may appear after a cataract operation (blue and red vision) or following exposure to an intense illumination (red vision) or in people suffering from carbon monoxide poisoning and oxygen deprivation. This may cause some damage to the areas of the visual cortex involved in the processing of colour perception, because these areas are supplied with more blood vessels than other areas of the visual cortex. Syn. chromopsia. See euchromatopsia; xanthopsia.

There's a word for everything.*

Now that I have a name for it hopefully I can find a way to reduce the condition his eyeglasses are producing.

Keep the suggestions coming!!!

*(except the boundless knowledge of drk)

[Uilleann]

It is possible the chromatopsic condition existed before the pt's cat Sx, and the new, clearer vision simply revealed what was already there.

[drk]

My thought is whether he's on a med that can do this.

[Uncle Fester]

My thought is whether he's on a med that can do this.

Me thinks you may be on to something.

Hydrochlorthiazide
Bupropian
Avapro
Lipitor
Metoprolol
Aspirin
Ducosote Sodium
Celebrex
Calcium +D
Spectravite diazepam
Indomethacine
Ambien
Ducosote sodium w/ Sennosides

[Chris Ryser]

[Edit: Had to look it up...."Magenta" would be the proper reference, depending on the green in question. They say men only have a 1-bit color scheme. Our brains only really refer to 8 colors....] :P

Hayde was right, depending on the green some red would be needed to make it perfectly grey, which means neutral.

You can check it yourself in the chart I made for the Ophthalmology Times and also put it on my website

see at:

http://optochemicals.com/tinting_colorguide.htm

[drk]

diazepam may be the culprit.

[Hayde]

... depending on the green...

Yessir, too early to worry about picking the right word since we haven't pinned down the green. "Chartruese" could swing it back to a more bluish counter. I'd suggest having the tinter warmed up when the patient arrives. When Fester zeroes in on the patent's favorite prepared pre-set, he can then fine-tune it all in the same visit. It was my thought that the final color itself might be a good diagnostic clue.

Either way, even if the tint is slight, we're not positive yet if the patient isn't already having diminished light sensitivity that's gone unreported/undetected--so I'd definitely confer with his doc before making new tinted lenses.

[Chris Ryser]

diazepam may be the culprit.

Having had no clue what drk is talking about............

I looked it up on Google and got the following answer.

Diazepam is a benzodiazepine (ben-zoe-dye-AZE-eh-peens). It affects chemicals in the brain that may be unbalanced in people with anxiety. Diazepam is used to treat anxiety disorders, alcohol withdrawal symptoms, or muscle spasms. Diazepam is sometimes used with other medications to treat seizures.

[drk]

I'm not sure I have a clue what I'm talking about, either!

Just speculation.

[Hayde]

Hey, Fester...any news on this one?

[Uncle Fester]

Just changed from poly to CR-39--- solved it!

[Tallboy]

Awesome!