Cornea
Conditions
Brief summary
The purpose of this study is to evaluate the precision and agreement of the study device, a specular microscope, in comparison to a currently commercially available specular microscope in establishing substantial equivalence of the two devices in clinical use for diagnostic purposes of the human cornea.
Detailed description
The observational clinical investigation is intended to measure agreement between two diagnostic instruments of the eye's corneal endothelium. The study device is the EM-3000 specular microscope and the control device is the NonCon Robo Pachy (F&A) (CellChek XL) specular microscope. Both instruments measure corneal endothelial cell layer parameters including cell density, coefficient of variation, percent hexagonality, and central thickness. The primary variable is the measurement of agreement between the two instruments for the four parameters described. The secondary variables include repeatability (intra-investigator) and reproducibility both inter-investigator, and inter-instrument. Additionally, measurements of agreement will be made on the EM-3000 using automated analysis with and without touch-up.
Interventions
OTHERObservational
Intervention is observational to two different diagnostic devices for which comparative readings of the corneal endothelium are being measured; the test device- the EM-3000 Specular Microscope against the Konan Robo-pachy F&A Specular Microscope.
Sponsors
Ohio State University
R. P. Chiacchierini Consulting, LLC
Tomey Corporation
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
Yes
Inclusion criteria
* Eyes with one of the following corneal conditions: Non-pathologic younger eyes (18-50 yrs) Non-pathologic older eyes (51-80 yrs) Pathologic adult eyes (29-80)
Exclusion criteria
1. Seriously ill or unconscious subject, mentally ill person, mentally handicapped person, person who is unable to read or write. * Non-Pathologic subjects who have the following conditions : 2. History of corneal transplant 3. Long term Fuch's dystrophy (and other corneal endothelial dystrophy) 4. Guttata 5. History of cataract or ocular surgical procedures that render the cornea opaque or otherwise impact its ability to be imaged using the investigational device 6. Long term PMMA contact lens use longer than 5 years -Pathologic subjects 7. Keratoconus
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Agreement Between EM-3000 and NonCon Robo Pachy F&A (CellChek XL) | 1 day visit per subject. | For Agreement between the two instruments, outcome measures include endothelial cell density (/mm2), coefficient of variation between the two instruments (SD x CD x 10-6, and percent hexagonality of cells in the measured visible field of view between the two instruments. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Investigate Repeatability and Reproducibility between the EM-3000 and NonCon Robo Pachy F&A (CellChek XL) Specular Microscopes | 1 day visit per subject. | To investigate repeatability (intra-investigator) in the EM-3000 specular microscope in the four outcome measures of the corneal endothelium as well as corneal thickness. To investigate reproducibility (inter-investigator/instrument) of the EM-3000 specular microscope in the four outcome measures of the corneal endothelium and corneal thickness. |
Countries
United States
Outcome results
None listed