Banner - Collaborative Care Symposium

News
Media
Conferences
Events
Publications
CME
Partners
Subscribe
Resources

|Videos|May 4, 2022

Standard keratometry values perform better compared to total keratometry values in eyes undergoing concurrent cataract surgery and DMEK

Author(s)Asher Khan, BS

Results concluded that K did better than TK in a variety of situations.

The study, “Accuracy of Multivariable IOL Formulas Using K and TK in Eyes. Undergoing Combined Cataract Surgery and DMEK," was presented by Asher Khan, BS, a research fellow at Dean McGee Eye Institute.

This retrospective review assessed and compared the accuracy of IOL formulas using K and TK values in eyes undergoing concurrent cataract surgery and DMEK.

Result takeaways:

K did better than TK
“Adjusted” K-6 performed the best
Multivariable formulas (Kane, K-6, EVO, and DGS) performed strongly
SRK/T also had a relatively strong performance
Haigis and Barrett did poorly with TK values

Conclusions:

IOL calculations remain challenging in combined phaco/DMEK eyes
Every formula performed better with K than with TK
Multivariable formulas (Kane, K-6, EVO, and DGS) with K values performed the best
While TK values can be helpful in other eyes (such as KCN or post-refractive), we advise that surgeons utilize K values when performing combined Phaco/DMEK surgery

"Use K when doing phaco/DMEK, K?" - Asher Khan, BS

Newsletter

Don’t miss out—get Ophthalmology Times updates on the latest clinical advancements and expert interviews, straight to your inbox.

Latest CME

Expanding Treatment Options for Demodex Blepharitis: Patient-Centric Approaches to Therapy

Expanding Treatment Options for Demodex Blepharitis: Patient-Centric Approaches to Therapy

Jade Coats, OD, FAAO; Angela Y. Zhu, MD

Expanding Treatment Options for Demodex Blepharitis: Patient-Centric Approaches to Therapy

Expanding Treatment Options for Demodex Blepharitis: Patient-Centric Approaches to Therapy

Jade Coats, OD, FAAO; Angela Y. Zhu, MD

(CME Credit) Community Practice Connections™: Applying Advances in Neovascular Retinal Disease - Expanding Treatment Intervals & Enhancing Outcomes

(CME Credit) Community Practice Connections™: Applying Advances in Neovascular Retinal Disease - Expanding Treatment Intervals & Enhancing Outcomes

Arshad M. Khanani, MD, MA, FASRS; Carl J. Danzig, MD, FASRS; Jennifer I. Lim, MD, FARVO

Interventional Glaucoma Treatment: Evolving Paradigms for Addressing Unmet Needs

Interventional Glaucoma Treatment: Evolving Paradigms for Addressing Unmet Needs

Deborah Ristvedt, DO; Melissa Tawa, OD, FAAO

Rapid Reviews in Retina™: Emerging Updates from Fall 2024 - Addressing the Wealth of New Data in Treatments for nAMD and DME

Rapid Reviews in Retina™: Emerging Updates from Fall 2024 - Addressing the Wealth of New Data in Treatments for nAMD and DME

Diana V. Do, MD; Michael W. Stewart, MD; Paolo Lanzetta, MD; Dilraj Grewal, MD

(COPE Credit) Time Matters in GA: The Impact of Early Detection and Proactive Treatment Approaches

(COPE Credit) Time Matters in GA: The Impact of Early Detection and Proactive Treatment Approaches

Laxmi V. Devisetty, MD; Rodney P. Coe, MD, MS; Majda Hadziahmetovic, MD; Xiao Yi (Ellie) Zhou, MD

Practical Approaches to Modern Dry Eye Treatment and Management

Practical Approaches to Modern Dry Eye Treatment and Management

Marc R. Bloomenstein, OD, FAAO; Cory J. Lappin, OD, MS, FAAO; Selina R. McGee, OD, FAAO

(COPE Track) The TED Perspective: A Multidisciplinary Approach to Thyroid Eye Care

(COPE Track) The TED Perspective: A Multidisciplinary Approach to Thyroid Eye Care

Sara T. Wester, MD, FACS; Cecelia Koetting, OD; Sophie Liao, MD; Jennifer Murdock, MD

(COPE Track) Revolutionizing nAMD and DME Management: Collaborative Strategies in the Age of Durable Treatments

(COPE Track) Revolutionizing nAMD and DME Management: Collaborative Strategies in the Age of Durable Treatments

David S. Liao, MD, PhD; Chang Sup Lee, MD; Douglas Matsunaga, MD; Daniel Su, MD

(CME Track) Collaborative Community Connections™: Mastering the Management of nAMD and DME Through Therapeutic Innovation

(CME Track) Collaborative Community Connections™: Mastering the Management of nAMD and DME Through Therapeutic Innovation

Veeral Sheth, MD, MBA, FASRS, FACS; Mark R. Barakat, MD, FASRS; Geeta Lalwani, MD; Xiao Yi Zhou, MD

(CME Track) Neurotrophic Keratitis: Multidisciplinary Approaches to Enhance Patient Outcomes

(CME Track) Neurotrophic Keratitis: Multidisciplinary Approaches to Enhance Patient Outcomes

Melissa Barnett, OD, FAAO, FSLS, FBCLA; Cecelia Koetting, OD, FAAO, DipABO; Quan Đông Nguyễn, MD, MSc; Jennifer Li, MD

(CME Track) The Neural Network: Exploring The Role of Neuromodulation in Dry Eye Disease Management

(CME Track) The Neural Network: Exploring The Role of Neuromodulation in Dry Eye Disease Management

Marjan Farid, MD; John Hovanesian, MD; Beeran Meghpara, MD

(COPE Track) The Neural Network: Exploring The Role of Neuromodulation in Dry Eye Disease Management

(COPE Track) The Neural Network: Exploring The Role of Neuromodulation in Dry Eye Disease Management

Marjan Farid, MD; John Hovanesian, MD; Beeran Meghpara, MD

(CME Track) Toric IOLs Unleashed: From Technological Progress to Patient Success

(CME Track) Toric IOLs Unleashed: From Technological Progress to Patient Success

Tanner Ferguson, MD; Taj Nasser, MD, FWCRS

(CME Track) Clinical Case Connections: Understanding the Impact of Advances in Treatment for DME and DR

(CME Track) Clinical Case Connections: Understanding the Impact of Advances in Treatment for DME and DR

David A. Eichenbaum, MD

(CME Track) Clinical Case Connections: Expert Insights on Applying Therapeutic Innovations in nAMD

(CME Track) Clinical Case Connections: Expert Insights on Applying Therapeutic Innovations in nAMD

Nathan C. Steinle, MD

(COPE Track) Toric IOLs Unleashed: From Technological Progress to Patient Success

(COPE Track) Toric IOLs Unleashed: From Technological Progress to Patient Success

Tanner Ferguson, MD; Taj Nasser, MD, FWCRS

(COPE Track) Clinical Case Connections: Expert Insights on Applying Therapeutic Innovations in nAMD

(COPE Track) Clinical Case Connections: Expert Insights on Applying Therapeutic Innovations in nAMD

Nathan C. Steinle, MD

(COPE Track) Clinical Case Connections: Understanding the Impact of Advances in Treatment for DME and DR

(COPE Track) Clinical Case Connections: Understanding the Impact of Advances in Treatment for DME and DR

David A. Eichenbaum, MD

(CME Credit) Navigating Pharmacological Presbyopia Treatment for Enhanced Patient Care

(CME Credit) Navigating Pharmacological Presbyopia Treatment for Enhanced Patient Care

Jacob Lang, OD, FAAO; Selina R. McGee, OD, FAAO; Neda Shamie, MD

Neurotrophic Keratitis Insights: An Interactive Corneal Sensitivity Testing Workshop

Neurotrophic Keratitis Insights: An Interactive Corneal Sensitivity Testing Workshop

John D. Gelles, OD, FAAO, FIAOMC, FCLSA, FSLS, FBCLA; John Hovanesian, MD, FACS

(COPE Credit) Navigating Pharmacological Presbyopia Treatment for Enhanced Patient Care

(COPE Credit) Navigating Pharmacological Presbyopia Treatment for Enhanced Patient Care

Jacob Lang, OD, FAAO; Selina R. McGee, OD, FAAO; Neda Shamie, MD

(COPE Track) Small Mites, Big Impact: Revolutionizing Demodex Blepharitis Care

(COPE Track) Small Mites, Big Impact: Revolutionizing Demodex Blepharitis Care

Arjan Hura, MD; Neda Shamie, MD; Kristin Barnes, OD

(CME Track) Small Mites, Big Impact: Revolutionizing Demodex Blepharitis Care

(CME Track) Small Mites, Big Impact: Revolutionizing Demodex Blepharitis Care

Arjan Hura, MD; Neda Shamie, MD; Kristin Barnes, OD

Rapid Reviews in Retina™: Emerging Updates from Spring 2025—Addressing the Wealth of New Data in Treatments for Neovascular Retinal Disease

Rapid Reviews in Retina™: Emerging Updates from Spring 2025—Addressing the Wealth of New Data in Treatments for Neovascular Retinal Disease

SriniVas Sadda, MD, FARVO; Nathan Steinle, MD

Interventional Dry Eye: A Stepwise Treatment & Management Approach

Interventional Dry Eye: A Stepwise Treatment & Management Approach

Mark Schaeffer, OD, FAAO; Mile Brujic, OD, FAAO; Nate Lighthizer, OD, FAAO, FAAOMS; Selina R. McGee, OD, FAAO

(CME Track) A Forward Look at Anti-VEGF Therapies: A Paradigm Shift in Neovascular Retinal Disease Management

(CME Track) A Forward Look at Anti-VEGF Therapies: A Paradigm Shift in Neovascular Retinal Disease Management

David Almeida, MD, PhD, MBA; Margaret A. Chang, MD, MS; Arshad M. Khanani, MD, MA, FASRS; Jessica Randolph, MD

(CME Track) Rapid Reviews in Retina™: Emerging Updates from Summer 2025—Addressing the Wealth of New Data in Treatments for Neovascular Retinal Disease

(CME Track) Rapid Reviews in Retina™: Emerging Updates from Summer 2025—Addressing the Wealth of New Data in Treatments for Neovascular Retinal Disease

Mark R. Barakat, MD, FASRS; David Eichenbaum, MD, FASRS

(CME Track) Collaborating Across the Continuum™: Best Practices in Patient-Centric Team Management of XLRP

(CME Track) Collaborating Across the Continuum™: Best Practices in Patient-Centric Team Management of XLRP

Ramiro Maldonado, MD; Rebecca Nelson, MS, CGC; Robert A. Sisk, MD, FACS, FASRS

(CME Track) Community Collaborative Connections™: Optimizing the Collaborative Care of Neovascular Retinal Disease in a New Age of Treatment

(CME Track) Community Collaborative Connections™: Optimizing the Collaborative Care of Neovascular Retinal Disease in a New Age of Treatment

Dilsher Dhoot, MD, FASRS; Jordana G. Fein, MD, MS; Deep Parikh, MD; Xiao-Yi (Ellie) Zhou, MD

(CME Track) The Evolution of MacTel Management: Integrating Neuroprotective Therapies Into Clinical Practice

(CME Track) The Evolution of MacTel Management: Integrating Neuroprotective Therapies Into Clinical Practice

Dante Pieramici, MD, FASRS; Dean Eliott, MD; Robin A. Vora, MD; Charles C. Wykoff, MD, PhD, FASRS

Navigating Advances in Neovascular Retinal Disease: Translating Evidence to Practice in AMD, DME, and RVO

Navigating Advances in Neovascular Retinal Disease: Translating Evidence to Practice in AMD, DME, and RVO

SriniVas R. Sadda, MD, FARVO; Mark R. Barakat, MD, FASRS; David A. Eichenbaum, MD, FASRS

(CME Track) Beyond the Collarette: Empowering Patients in the Management of Demodex Blepharitis

(CME Track) Beyond the Collarette: Empowering Patients in the Management of Demodex Blepharitis

Stephen C. Pflugfelder, MD; Cecelia Koetting, OD, FAAO, DipABO

(COPE Track) Beyond the Collarette: Empowering Patients in the Management of Demodex Blepharitis

(COPE Track) Beyond the Collarette: Empowering Patients in the Management of Demodex Blepharitis

Stephen C. Pflugfelder, MD; Cecelia Koetting, OD, FAAO, DipABO

(COPE) Optimizing Management of Ocular Toxicity in Cancer Patients: The Role of Ophthalmologists in the Spectrum of Care

(COPE) Optimizing Management of Ocular Toxicity in Cancer Patients: The Role of Ophthalmologists in the Spectrum of Care

Asim V. Farooq, MD; Joann Kang, MD; Nita Lee, MD, MPH

Community Practice Connections�™: Transforming Treatment in nAMD, DME, and DR – Keeping an Eye on Optimal Outcomes

Community Practice Connections™: Transforming Treatment in nAMD, DME, and DR – Keeping an Eye on Optimal Outcomes

David A. Eichenbaum, MD; Roger A. Goldberg, MD, MBA; Priya Vakharia, MD; Geeta Lalwani, MD

(CME) Optimizing Management of Ocular Toxicity in Cancer Patients: The Role of Ophthalmologists in the Spectrum of Care

(CME) Optimizing Management of Ocular Toxicity in Cancer Patients: The Role of Ophthalmologists in the Spectrum of Care

Asim V. Farooq, MD; Joann Kang, MD; Nita Lee, MD, MPH

Expert Perspectives on Technological Advances in Cataract Surgery

Expert Perspectives on Technological Advances in Cataract Surgery

Elizabeth Yeu, MD; Ashley Behrens, MD; Jade Coats, OD

Burst CME™ Part 3: Initiating Early Intervention in Patients With Glaucoma Who Fail Pharmacological Therapy

Burst CME™ Part 3: Initiating Early Intervention in Patients With Glaucoma Who Fail Pharmacological Therapy

Deborah Ristvedt, DO; Melissa Tawa, OD, FAAO

(CME Track) Burst CME™ Part 1: Insights Into Glaucoma and the Need for Early Intervention

(CME Track) Burst CME™ Part 1: Insights Into Glaucoma and the Need for Early Intervention

Deborah Ristvedt, DO; Melissa Tawa, OD, FAAO

Interventional Glaucoma Treatment: Evolving Paradigms for Addressing Unmet Needs

Interventional Glaucoma Treatment: Evolving Paradigms for Addressing Unmet Needs

Deborah Ristvedt, DO; Melissa Tawa, OD, FAAO

(COPE Credit) Community Practice Connections™: Applying Advances in Neovascular Retinal Disease - Expanding Treatment Intervals & Enhancing Outcomes

(COPE Credit) Community Practice Connections™: Applying Advances in Neovascular Retinal Disease - Expanding Treatment Intervals & Enhancing Outcomes

Arshad M. Khanani, MD, MA, FASRS; Carl J. Danzig, MD, FASRS; Jennifer I. Lim, MD, FARVO

(CME Track) Neurotrophic Keratitis in Focus – From Early Recognition to Strategic Intervention

(CME Track) Neurotrophic Keratitis in Focus – From Early Recognition to Strategic Intervention

Jacqueline Theis, OD, FAAO; Cecelia Koetting, OD, FAAO, DipABO; Melissa Barnett, OD, FAAO, FSLS, FBCLA

(COPE Track) Neurotrophic Keratitis in Focus – From Early Recognition to Strategic Intervention

(COPE Track) Neurotrophic Keratitis in Focus – From Early Recognition to Strategic Intervention

Jacqueline Theis, OD, FAAO; Cecelia Koetting, OD, FAAO, DipABO; Melissa Barnett, OD, FAAO, FSLS, FBCLA

(COPE Track) Leveraging Rho Kinase Inhibition in Glaucoma Management — How Can Novel Treatment Pathways Impact Patient Outcomes?

(COPE Track) Leveraging Rho Kinase Inhibition in Glaucoma Management — How Can Novel Treatment Pathways Impact Patient Outcomes?

Mitch Ibach, OD, FAAO; Jessica Steen, OD, FAAO

(CME Track) Leveraging Rho Kinase Inhibition in Glaucoma Management — How Can Novel Treatment Pathways Impact Patient Outcomes?

(CME Track) Leveraging Rho Kinase Inhibition in Glaucoma Management — How Can Novel Treatment Pathways Impact Patient Outcomes?

Mitch Ibach, OD, FAAO; Jessica Steen, OD, FAAO

EnVision Summit

In-Person Event

EnVision Summit

February 13-16, 2026

(CME Credit) Time Matters in GA: The Impact of Early Detection and Proactive Treatment Approaches

(CME Credit) Time Matters in GA: The Impact of Early Detection and Proactive Treatment Approaches

Laxmi V. Devisetty, MD; Rodney P. Coe, MD, MS; Majda Hadziahmetovic, MD; Xiao Yi (Ellie) Zhou, MD

(CME Track) Expanding Horizons in Toric IOLs: Translating Technological Advances Into Improved Patient Outcomes

(CME Track) Expanding Horizons in Toric IOLs: Translating Technological Advances Into Improved Patient Outcomes

Rahul Tonk, MD, MBA

(CME Track) Patient-Centered Treatment Strategies in the Management of nAMD and DME

(CME Track) Patient-Centered Treatment Strategies in the Management of nAMD and DME

Adrienne W. Scott, MD, FASRS; Justine Cheng, MD; Hong-Uyen Hua, MD; Sherrol A. Reynolds OD, FAAO, FNAP

(CME Track) The TED Perspective: A Multidisciplinary Approach to Thyroid Eye Care

(CME Track) The TED Perspective: A Multidisciplinary Approach to Thyroid Eye Care

Sara T. Wester, MD, FACS; Cecelia Koetting, OD; Sophie Liao, MD; Jennifer Murdock, MD

(CME Track) Visionary Approaches: Rethinking Therapeutic and Interventional Glaucoma Management

(CME Track) Visionary Approaches: Rethinking Therapeutic and Interventional Glaucoma Management

Rachel Simpson, MD; James Murphy, MD; Mary Qiu, MD; Jessica Steen, OD, FAAO

(CME Track) Revolutionizing nAMD and DME Management: Collaborative Strategies in the Age of Durable Treatments

(CME Track) Revolutionizing nAMD and DME Management: Collaborative Strategies in the Age of Durable Treatments

David S. Liao, MD, PhD; Chang Sup Lee, MD; Douglas Matsunaga, MD; Daniel Su, MD

$(CME Track) The Neural Frontier: Mapping Neurostimulation Across the DED Patient Spectrum for Refractive Surgery$

(CME Track) The Neural Frontier: Mapping Neurostimulation Across the DED Patient Spectrum for Refractive Surgery

Zeba A. Syed, MD

(COPE Track) Visionary Approaches: Rethinking Therapeutic and Interventional Glaucoma Management

(COPE Track) Visionary Approaches: Rethinking Therapeutic and Interventional Glaucoma Management

Rachel Simpson, MD; James Murphy, MD; Mary Qiu, MD; Jessica Steen, OD, FAAO

$(COPE Track) The Neural Frontier: Mapping Neurostimulation Across the DED Patient Spectrum for Refractive Surgery$

(COPE Track) The Neural Frontier: Mapping Neurostimulation Across the DED Patient Spectrum for Refractive Surgery

Zeba A. Syed, MD

(COPE Track) Expanding Horizons in Toric IOLs: Translating Technological Advances Into Improved Patient Outcomes

(COPE Track) Expanding Horizons in Toric IOLs: Translating Technological Advances Into Improved Patient Outcomes

Rahul Tonk, MD, MBA

(COPE Track) Patient-Centered Treatment Strategies in the Management of nAMD and DME

(COPE Track) Patient-Centered Treatment Strategies in the Management of nAMD and DME

Adrienne W. Scott, MD, FASRS; Justine Cheng, MD; Hong-Uyen Hua, MD; Sherrol A. Reynolds OD, FAAO, FNAP

20th Annual Controversies in Modern Eye Care

In-Person Event

20th Annual Controversies in Modern Eye Care

April 19, 2026

(CME Track) Clinical Consultations™: Framing a New Approach to Geographic Atrophy Management – Expert Insights into Recent Developments

(CME Track) Clinical Consultations™: Framing a New Approach to Geographic Atrophy Management – Expert Insights into Recent Developments

Yasha Modi, MD; Carolyn Majcher, OD, FAAO, FORS

(COPE Track) Clinical Consultations™: Framing a New Approach to Geographic Atrophy Management – Expert Insights into Recent Developments

(COPE Track) Clinical Consultations™: Framing a New Approach to Geographic Atrophy Management – Expert Insights into Recent Developments

Yasha Modi, MD; Carolyn Majcher, OD, FAAO, FORS

(CME Track) Rapid Reviews in Retina™: Emerging Updates from Winter 2025 – Addressing the Wealth of New Data in Treatments for nAMD and DME

(CME Track) Rapid Reviews in Retina™: Emerging Updates from Winter 2025 – Addressing the Wealth of New Data in Treatments for nAMD and DME

David M. Brown, MD, FACS; Dilraj S. Grewal, MD

(COPE Track) Rapid Reviews in Retina™: Emerging Updates from Winter 2025 – Addressing the Wealth of New Data in Treatments for nAMD and DME

(COPE Track) Rapid Reviews in Retina™: Emerging Updates from Winter 2025 – Addressing the Wealth of New Data in Treatments for nAMD and DME

David M. Brown, MD, FACS; Dilraj S. Grewal, MD

Living With X-Linked Retinitis Pigmentosa: What We Can Learn From a Patient’s Experience

Living With X-Linked Retinitis Pigmentosa: What We Can Learn From a Patient’s Experience

Lejla Vajzovic, MD, FASRS; Ramiro Maldonado, MD

Living With X-Linked Retinitis Pigmentosa: What We Can Learn From a Patient’s Experience

Living With X-Linked Retinitis Pigmentosa: What We Can Learn From a Patient’s Experience

Lejla Vajzovic, MD, FASRS; Ramiro Maldonado, MD

(COPE Track) Collaborative Community Connections™: Mastering the Management of nAMD and DME Through Therapeutic Innovation

(COPE Track) Collaborative Community Connections™: Mastering the Management of nAMD and DME Through Therapeutic Innovation

Veeral Sheth, MD, MBA, FASRS, FACS; Mark R. Barakat, MD, FASRS; Geeta Lalwani, MD; Xiao Yi Zhou, MD

Collaborative Care Symposium

Collaborative Care Symposium

May 2-3, 2026

Navigating the Glaucoma Therapeutic and Surgical Landscape: From Conventional to Cutting-Edge

Navigating the Glaucoma Therapeutic and Surgical Landscape: From Conventional to Cutting-Edge

Deborah Ristvedt, DO; Melissa Tawa, OD, FAAO

(COPE Track) Neurotrophic Keratitis: Multidisciplinary Approaches to Enhance Patient Outcomes

(COPE Track) Neurotrophic Keratitis: Multidisciplinary Approaches to Enhance Patient Outcomes

Melissa Barnett, OD, FAAO, FSLS, FBCLA; Cecelia Koetting, OD, FAAO, DipABO; Quan Đông Nguyễn, MD, MSc; Jennifer Li, MD

Trending on Ophthalmology Times - Clinical Insights for Eye Specialists

SparingVision doses first patient in NYRVANA clinical trial of SPVN20 for retinitis pigmentosa

Eli Lilly to acquire Adverum Biotechnologies

Anti-VEGF innovations in retinal disease: From molecules to medicine

From lab to clinic: Advancing ophthalmic technology

Regeneron receives another CRL for its Eylea 8 mg

© 2025 MJH Life Sciences^®

All rights reserved.