Diagnostic Instruments

Jones, Lyndon; Walsh, Karen; Ng, Alison; Schulze, Marc-Mathias

doi:10.1016/b978-0-7020-8427-0.00034-9

Cited by 2 publications

(3 citation statements)

References 344 publications

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“…Advanced, multi-functional diagnostic devices have only become widely available within optometric practices over the last few years. 1 These devices undertake a variety of functions, providing savings in physical space, cost, and time to gather clinical information. Many of these instruments include the assessment of corneal topography.…”

Section: Introductionmentioning

confidence: 99%

“…Placido-disc systems project a series of concentric light rings on the cornea, capture the image of the reflected rings, and analyze the data along the rings. 1,7,8 By measuring the distance between the rings and their relationship with each other, these topographers provide accurate information on the anterior surface, such as corneal curvature and tear layer quality. 3,5,[7][8][9][10][11] Two types of Placido-disc systems are available, small and large-cone.…”

Section: Introductionmentioning

confidence: 99%

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Medmont Meridia™: Much More Than a Corneal Topographer

Fadel

2023

OPTO

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In recent years, advanced diagnostic instruments have become widely available in optometric practices, offering various functions that optimize clinical information gathering. This article focuses on the Medmont Meridia™, a state-of-the-art multipurpose diagnostic device with corneal topography and cutting-edge features. Corneal topography is pivotal in the early diagnosis of corneal disorders, determining baseline ocular surface assessment, helping in contact lens fitting, and monitoring ocular health over time. The Medmont Meridia boasts Placido-disc-based imaging with extensive corneal coverage. Furthermore, the Meridia accurately measures the horizontal visible iris diameter, pupil diameter, and palpebral fissure width, which assists in making contact lens parameter decisions. Additionally, it offers sagittal height data for scleral lens design and first lens selection, streamlining the fitting process. Beyond its topography capabilities, the Meridia excels as a comprehensive dry eye assessment tool. With features like tear meniscus height, tear film surface quality, and meibography capabilities, it aids in diagnosing dry eye and monitoring its progression. The device also provides customizable dry eye reports with integrated grading scales and questionnaires, making dry eye management, patient education, and compliance more accessible. In conclusion, the Medmont Meridia consolidates a multitude of examination tools in a single instrument, enhancing practice efficiency and elevating patient care and communication. Its versatility and accuracy make it an invaluable asset in optometric practices worldwide.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Medmont Meridia™: Much More Than a Corneal Topographer

Fadel

2023

OPTO

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“…This is done by applying the Scheimpflug principle using a rotating camera that takes 50 cross-sectional images from 0 to 180 degrees allowing for an increased depth of focus, leading to a high-quality image of the cornea and anterior chamber. 8 As a noninvasive and low-cost evaluation, it is a great tool for evaluating possible risks for prospective DSEK patients. In this study, we evaluate the preoperative anterior chamber depth (ACD) as measured by Scheimpflug tomography in DSEK recipients to determine whether preoperative ACD could serve as a predictor of DSEK graft failure and need for repeat keratoplasty.…”

mentioning

confidence: 99%

Scheimpflug Corneal Tomography Anterior Chamber Depth in Descemet Stripping Endothelial Keratoplasty Recipients

Mandell,

Pajek,

Vanner

et al. 2023

Cornea

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Purpose: Our study investigates whether preoperative anterior chamber depth (ACD) measured by Scheimpflug tomography could serve as a potential predictor of graft failure in eyes undergoing Descemet stripping endothelial keratoplasty (DSEK). Methods: A retrospective review was conducted on patients who underwent primary or repeat DSEK between January 2020 and August 2021 at Bascom Palmer Eye Institute. Charts from 378 primary and 192 repeat DSEK patients were reviewed and ultimately 47 primary and 21 repeat DSEK patients met criteria for inclusion. Data collection included demographics, preoperative ACD, best-corrected visual acuity, and length of follow-up. Results: Demographics were similar between groups, and there was no significant difference in the average best-corrected visual acuity between the single and repeat DSEK groups preoperatively. Baseline preoperative ACD was greatest in the single DSEK group (3.51 ± 0.90 mm) when compared to baseline preoperative ACD in the repeat DSEK group (3.01 ± 0.67 mm, P = 0.003). The preoperative mean ACD was smallest in the repeat DSEK group before the second DSEK (2.94 ± 0.48 mm, P = 0.001). Preoperative baseline ACD was the only variable to affect graft survival time significantly (P = 0.012). The incidence of glaucoma diagnosis was similar in both groups (42.5% vs. 42.8%, P = 0.471). The diagnosis of glaucoma and presence of incisional glaucoma surgery did not affect the graft survival time (P = 0.129, P = 0.559) or need for repeat DSEK. Conclusions: Smaller baseline preoperative Scheimpflug ACD measurement may be a possible predictor of the need for repeat DSEK. Our study found that Scheimpflug ACD decreases with subsequent DSEK failure.

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Diagnostic Instruments

Cited by 2 publications

References 344 publications

Medmont Meridia™: Much More Than a Corneal Topographer

Medmont Meridia™: Much More Than a Corneal Topographer

Scheimpflug Corneal Tomography Anterior Chamber Depth in Descemet Stripping Endothelial Keratoplasty Recipients

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