By Maryam Moharib, BOptom, BHSc, CSPO, CAPM

In Part 1, we explored why data portability matters and the legal and technical challenges that can arise when switching EMRs in optometry clinics. Now that the “why” is clear, it’s time to focus on the “how.”

In this article, we look at how to make the data transition smooth and secure, and how to ensure that information is accurately transferred into the appropriate patient fields.

Migrating from one EMR to another is one of the most significant digital transformations a clinic can undertake. When approached thoughtfully, it can modernize workflows, improve operational efficiency, and strengthen patient care. Without proper preparation, however, it can lead to disruption, data loss, and frustration.

This article outlines the key steps clinics should take to ensure a smooth, secure, and compliant EMR migration.

Optometry-Specific Data Considerations

Optometry data presents unique challenges beyond those in general medicine. It combines clinical information, diagnostic imaging, and retail operations. Knowing exactly what data your current EMR holds—and how it is structured—is the foundation of a successful migration.

Optometric data categories can include:

• Diagnostic Imaging: OCT scans, fundus photographs, and corneal topographies often exist in large, specialized file formats (such as DICOM). Without proper planning, images may be reduced to static PDFs, losing their interactive diagnostic value. Ensure the new EMR can import these files or integrate with compatible image viewers.
• Refractive Prescription Data: Accurate migration of eyeglass and contact lens prescriptions is critical. If stored in proprietary or semi-structured fields, values such as sphere, base curve, and diameter must be carefully mapped to ensure accuracy in the new system.
• Dispensing and Inventory Records: Practices that use their EMR for optical sales, lens ordering, or frame inventory must decide whether to migrate this data or archive it separately.
• Device Integration: Diagnostic devices such as autorefractors, tonometers, and lensometers generate logs and measurements that must remain accessible. Ensure these files can be migrated or securely archived and confirm that the new EMR supports existing device integrations.
• Patient Consent and Signatures: Electronic signatures and digital consent forms are legally binding and must remain properly linked to patient records after migration.
• Recalls, Reminders, and Visit History: Recall schedules, reminders, and visit histories form the backbone of ongoing patient management. Ensure that patient histories, previous diagnoses (e.g., glaucoma, diabetic retinopathy), and recall intervals transfer completely to preserve continuity of care and support proactive follow-up.

“Create a data inventory spreadsheet listing each data type, where it resides, and whether it needs to be migrated, archived, or left behind.”

Key Considerations Before You Switch

Long before signing a contract with a new EMR vendor, it is important to ask the right questions. Clarity at this stage will define the success of the migration later on.

1. Export Formats: Ask how data will be exported. Will it be delivered as structured data (e.g., HL7 or FHIR standards) or unstructured PDFs? Structured data allows for better integration and ongoing use.
2. Costs and Timelines: Data extraction and migration often involve fees. Obtain written estimates outlining costs, timelines, and the level of support included.
3. Security Measures: Ensure all data will be encrypted during transfer, and that storage and hosting comply with Canadian and provincial requirements.
4. Validation Testing: Conduct a pilot migration using a small dataset. Compare records between systems to confirm accuracy before proceeding with a full migration.
5. Access to Legacy Records: Even with a successful migration, some data may remain easier to view in the old system. Maintain read-only access to legacy records for reference.

Did You Know?
“Under Canadian privacy law, optometrists remain the custodians of patient data even after switching vendors. This means responsibility for its integrity and accessibility remains with the optometrist—not the EMR provider.”

Preparing for an EMR Migration

A structured plan is one of the strongest indicators of success. Clinics that invest time in preparation, communication, and testing experience far fewer disruptions once the new EMR goes live.

• Inventory Your Data: Catalogue all information stored in the current EMR, including demographics, clinical notes, prescriptions, imaging, billing, and administrative data.
• Engage Both Vendors: The smoothest migrations occur when outgoing and incoming vendors communicate directly. Define clear deliverables, timelines, responsibilities, and success criteria in the new vendor contract.
• Plan for Staff Training: Train staff not only on the new system, but also on accessing legacy data and verifying migrated records.
• Schedule Wisely: Choose a transition window that minimizes patient disruption, ideally outside peak exam periods.
• Budget Realistically: Account for vendor fees, staff time, temporary productivity dips, and any dual-system access costs.

“Clinicians and administrative users often identify different types of issues.“

Validation and Testing

Once a pilot migration is complete, validate the data thoroughly. Compare patient records across systems to ensure accuracy of key fields such as diagnoses, prescriptions, and imaging files. Pay close attention to dates, authorship, and attachments, as these are often the first areas where discrepancies arise.

Involve staff from different roles in the validation process. Clinicians and administrative users often identify different types of issues. Once the pilot data is confirmed accurate and functional, proceed with the full migration with confidence.

The Bottom Line for Clinics

Migrating to a new EMR is a significant undertaking, but it does not have to be disruptive. By planning strategically, mapping data carefully, ensuring vendor collaboration, testing thoroughly, maintaining compliance, and training staff, clinics can protect years of valuable patient information while positioning themselves for long-term success.

Ultimately, a well-executed migration is not just about transferring data. It is about preserving clinical integrity, improving efficiency, and enabling your team to deliver high-quality patient care within a more advanced and effective system.

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