Contrast Sensitivity – Vivity vs. Eyhance vs. Tecnis (ZCBOO) vs. Arysof (SN60WF)
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I was interested in Vivity but the warning about Contrast Sensitivity concerned me. So I started looking into Eyhance. It's very difficult to compare IOL metrics since the data comes from all difference sources and often uses different testing configurations. And some data can only be sourced if you're a researcher or pay money for a paper. But I think I have it figured out. Here are some of my sources:
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Eyhance Specs from J&J
Go to jnjvisionpro and look in Products > Eyhance for a spec sheet with a defocus curve and graph of Through Frequency MTF Measurements. ACE model, 3 mm, white light graph (below)
FDA approval PDF for Vivity (Page 8)
Search on "P930014S126B" but only at 50 lp/mm and only for a 3mm (daylight conditions) pupil.
Eyhance Whitepaper from The Optomologist dotcom
Search on "Delivering intermediate vision the new tecnics eyhance monofocal iol"
There seem to be two ways to test Contrast Sensitivity, a lab test using an "ACE" model eye and actual people in a room looking at a chart trying to make out patterns of vertical lines. The former lp/mm units(?). The latter uses lines per degree. I managed to find data for all 4 lenses mentioned in the subject of this thread for the first kind of test (lp/mm). This is what I found. Sometimes I'm guessing at these numbers based on a visual graph.
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MTF 50 lp/mm at distance
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3mm (day)
Tecnis: 0.56
Acrysof: 0.46
Eyhance: 0.46
Vivity: 0.25
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5mm (night)
Tecnis: 0.42
Eyhance: 0.36
Acrysof: 0.28
Vivity: ???
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Vivity did OK in second kind of test (people in a room reading a chart) in binocular mesopic conditions. You can find that data in the FDA PDF as well as a presentation that you can find by searching on "Cathleen Mccabe ISO presentation". The presentation says the CS loss in binocular mesopic conditions is not "clinically significant" but it still concerns me.
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For discussion... should these lab-based measurements (using an ACE model eye) be taken with a grain of salt? Am I making myself crazy over nothing? Is it better to just focus on real world results and patient testimonials?
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If any of my numbers are wrong or if anyone finds more or better data please reply.
1 like, 41 replies
PeterRD Guest
Edited
Thanks David98963 for your research on the Alcon Vivity IOL and contrast sensitivity.
Refer to what looks like a briefing paper for eye surgeons:
https://www.accessdata.fda.gov/cdrh_docs/pdf/P930014S126C.pdf
See warning note 4 on P5 under "Contraindications"
This says it all for me!
Has anyone thought of considering Rayner's RayOne EMV for monovision?
Built in positive spherical aberration is a patented feature of this optic which gives a real boost to intermediate vision and for some patients even a small amount of close vision.
sarah43268 Guest
Edited
I had Vivity lenses implanted in both eyes this summer. If there is diminish contrast sensitivity, it's not enough for me to notice or be bothered by, day or night. In dim light. I need to throw on +1 readers to read fine print (like on a medicine bottle, not like on a restaurant menu). Driving at night feels safe.