To increase the success of your specialty contact lens practice, you need a corneal topographer that supports first-fit success. That’s what the Medmont Meridia™ does best. It provides a multitude of insights and information that makes contact lens fitting easier, quicker and more successful. That decreases chair time and costs and increases return on investment. 

Read on to discover the features and attributes that make Medmont’s most advanced topographer a must for ortho-k and custom lens fitters.  

Unparalleled corneal coverage 

Copious coverage 

With the Meridia™, you can achieve up to 11mm (and beyond) of real corneal data in a single capture on a normal cornea—no extrapolation necessary. That’s owing to its small cone construction, 32 Placido rings and hundreds of thousands of analysed points.  

In contrast, most topographers have large cones which require extrapolated data at the chord, where ortho-k lenses align, compromising accuracy. 

Composite mapping 

To gain an ideal starting point for your ortho-k or scleral lens fit, use the Meridia’s composite imaging to achieve limbus-to-limbus corneal coverage. This function merges various fixations together to measure and map the widest corneal coverage, enabling you to build a lens from edge to edge.  

Effortless auto-capture 

Elevate your topography workflow with the Meridia™’s ultra-convenient auto-capture feature; simply choose the most optimal map. The instrument initiates capture when you reach minimum alignment. Your job is to center the green cross hair and ensure an even tear film, guaranteeing distortion-free rings and precise data capture.  

Watch Randy Kojima FAAO demonstrate in the video below.  

Smart analysis attributes 

Harness the power of Medmont Studio, the Meridia™’s software.   Alongside standard topography attributes including axial, tangential, elevation maps, k’s and eccentricity, Medmont Studio lets you dive deeper, with over one hundred attributes for customising your dataset.  

Some contact lens brands create bespoke attributes within Medmont Studio, for collecting data at a specific point or across the entire topography for an analysis of the entire cornea.    

Here are just a few Medmont Studio attributes and features that elevate your contact lens fitting.  

Sagittal Differential Attribute 

This attribute helps you decide when to use a sphere or toric corneal GP, or ortho-k lens. It gives you an easy-to-comprehend analysis so you can quickly understand the eye shape—symmetric or toric—beyond the periphery.  

HVID Measurement Attribute 

To determine the appropriate lens shape for a comfortable and successful first fit, it’s necessary to measure the horizontal visible iris diameter (HVID). This is an essential component of lens uptake and dropout prevention. And while you could use a ruler to manually calculate HVID, it’s much more efficient with the Meridia™.  

The HVID Measurement attribute is especially useful if your patient has a smaller or larger HVID than average, or if the border is partially obscured by the diameter of the topography.  

Watch Randy Kojima FAAO demonstrate how to measure VID in Medmont Studio. 


Estimated Height (EH) Chord Attribute 

Sagittal depth is the distance between the center of the posterior surface to the plane of the lens edge. Use the EH attribute for a fast way to determine the initial sagittal depth (or ‘vault’) of a soft contact lens or scleral lens when fitting beyond the cornea. The EH Chord attribute also estimates the height beyond the cornea, onto the sclera. 

Subtractive maps (feature) 

A powerful yet underutilised tool, subtractive maps (or ‘comparison’ or ‘difference’ maps) enable you to monitor ortho-k changes and myopic reduction over time.  

Use them to compare pre and post treatment to gain deep understanding of changes to vision and the epithelial surface, and to track the evolution of patient conditions.  

Watch the video for an overview. 

Contact lens software 

Coupled with Medmont Studio 7, the Meridia™ empowers you with incredible lens design control.  

Choose from an extensive contact lens library and diverse design options for achieving the best fit. Use the contact lens simulator or integrate with popular contact lens design software, including KATT Cloud Platform, EyeSpace™ and WAVE—to name only a few.  

Tear Layer Profile fitting 

Use the tear film layer graph to assist lens selection and build. This is key to achieving a good fit in the principal meridians of the eye.   

The graph helps you understand tear fluid layer thickness where the lens vaults and lands. You can then influence lens-to-surface fit by manipulating parameters until you have the optimal fit.  

Take a look at the video below for reference.  

Convenient collaboration with contact lens labs  

With the Meridia™, you can export maps and data to a contact lens lab so they can design lenses for you. Lens consultants can also troubleshoot your lens fit by viewing your images and video as captured on the Meridia™; much more powerful than a verbal description or smartphone photo.  

By leveraging the expertise of a contact lens consultant, you boost your first-fit and refit success, lowering chair time and increasing your net gains. Most importantly, you ensure patients leave your office with the best possible vision and comfort. That’s a win-win. 

Holistic dry eye evaluation tools 

The Medmont Meridia™ Pro equips you with vital ocular surface assessment features for tear film and lens fit assessment. It has three light sources: cobalt for fluorescein, white for anterior and infra-red for meibography gland imaging.  

The Meridia™’s dry eye suite enables you to optimise ocular health for contact lens patients with the one instrument, both pre- and post- fitting, reducing discomfort and dropout. 

Seamless integration for existing Medmont customers 

The Meridia™ is backward compatible with Medmont’s E300 corneal topographer.  

By upgrading, you enjoy wider limbus-to-limbus coverage, gain a HD colour camera (Meridia™ Pro), a larger field of view and dry eye evaluation applications (Meridia™ Pro)—all while preserving existing patient data.   This means you can compare baseline maps in the same software (Medmont Studio) without losing patient information—vital for continuity of care. 

Would you like to learn more? 

As you navigate the world of specialty lenses, the Medmont Meridia™ is an indispensable tool for increased first-fit success, irrespective of your proficiency. Contact us for more info or to arrange a free virtual demo. 

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