Distributed in New Zealand by Ophthalmic Instrument Company, the Medmont Meridia Vantage is being positioned as a comprehensive anterior eye imaging platform, with scleral topography its key advance.
Speaking at the recent CCLS conference, Randy Kojima, specialty contact lens practitioner and R&D collaborator at Precision Technology Services, Vancouver, Canada, introduced the device as a step towards more data-driven scleral lens fitting.
“There’s a new Medmont that does scleral topography and that’s what the team asked me to share with you,” he said. “We are actually measuring the sclera, so it should improve the efficiency and accuracy of scleral-lens fitting.”
The instrument captures scleral shape using fluorescein reflection, either in a single shot or by merging up to five images into a composite map. In more challenging cases, composite capture can extend coverage to approximately 20mm. Kojima noted that, worldwide, approximately 90% of patients are fitted with a 16–17mm or smaller scleral lens, but the additional diameter measurements may assist with deep-set eyes or when selecting scleral lenses larger than 17mm.
Accuracy is still being evaluated. “I’d love to tell you that this thing is accurate to 10µ, but we really don’t know yet,” Kojima said. Early indications suggest results are “usually within about 50µ of where we think it is” for diagnostic lens selection, with some internal estimates closer to 15µ, under ideal conditions.
