Comparative Study of the Optical Biometer for Measurements of the Eye
26. juni 2013 opdateret af: Nidek Co. LTD.
Comparative Study of the Optical Biometer for the Measurements of Axial Length, Anterior Chamber Depth, Keratometry, Corneal Cylinder Axis, Corneal Thickness, White-to-White Distance, and Pupil Diameter
The primary purpose of this comparative clinical study is to collect clinical data to demonstrate the equivalence of the investigational device to the predicate device for measurements of the eye.
The secondary purpose is to evaluate any adverse events that occur during the clinical study.
Studieoversigt
Status
Afsluttet
Detaljeret beskrivelse
This is a prospective clinical study to be conducted at a single clinical site located in the United States.
This study will assess the agreement of an investigational device to the predicate device and an ultrasound reference device and the precision of the investigational device with a comparison to the precision of the predicate.
Any adverse events associated with the investigational device can or the predicate device will be assessed.
Undersøgelsestype
Observationel
Tilmelding (Faktiske)
125
Kontakter og lokationer
Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.
Studiesteder
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North Carolina
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Greensboro, North Carolina, Forenede Stater, 27410-2548
- Physicians Protocol
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Deltagelseskriterier
Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.
Berettigelseskriterier
Aldre berettiget til at studere
18 år og ældre (Voksen, Ældre voksen)
Tager imod sunde frivillige
Ja
Køn, der er berettiget til at studere
Alle
Prøveudtagningsmetode
Ikke-sandsynlighedsprøve
Studiebefolkning
Normal eyes(phakic eyes without cataracts or corneal disease), eyes with cataracts, eyes without a natural lens (including aphakic and pseudophakic eyes), eyes with corneal disease (including eyes post keratorefractive surgery).
Beskrivelse
Inclusion Criteria:
- Subjects who can follow the instructions by the Principal/Clinical Investigator or clinical staff at the clinical site, and can visit on scheduled examination dates.
- Subjects who sign an informed consent form to participate in the clinical trial.
- Subjects who agree to take the qualifying eye examination and a series of devices measurements.
- Subjects able to fixate on a target.
Subjects must meet at lease one of the following criteria:
- Normal eyes: Subjects with a natural lens without a cataract, corneal abnormalities or prior keratorefractive surgery.
- Eyes with Cataracts: Subjects with a pre-existing cataract without corneal abnormalities or prior keratorefractive surgery.
- Eyes without a Natural Lens: Subjects that are pseudophakic or aphakic without corneal abnormalities or prior keratorefractive surgery.
- Eyes with Corneal Abnormality: Subjects with a corneal abnormality and a natural lens without a cataract, or Subjects post keratorefractive surgery and a natural lens without a cataract.
Exclusion Criteria:
- Pregnancy.
- Any eye condition preventing use of any of the instruments used in the study.
- Any eye condition which might impair the validity of results from any of the instruments used in the study.
- Any medical condition, which, in the Investigator's judgment, interferes with the subject's ability to comply with the protocol, compromises subject safety, or interferes with the interpretation of the study results.
Studieplan
Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Kohorter og interventioner
Gruppe / kohorte |
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Agreement Cohort
All subjects in the agreement portion of the study will have a single measurement performed with each device, the Nidek optical biometer, predicate device and ultrasound reference device.
Each device will be operated by a different operator.
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Precision Cohort
All subjects in the precision portion of the study will each be paired with one Nidek optical biometer and with one predicate device for a total of three Nidek optical biometer/predicate device pairs.
Each of the three device pairs will be designated one and only one operator.
All subjects in the precision portion of the study will have their measurements repeated three times on each of three Nidek optical biometer and predicate device pairs.
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Agreement and Precision Endpoints Analyses
Tidsramme: Subjects will be followed for the duration of the procedure, up to one day.
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The agreement of the Nidek optical biometer with the predicate device will be assessed for the following measures:
In addition, the agreement of the Nidek optical biometer with the ultrasound reference device will be assessed for axial length and anterior chamber depth. The precision of Nidek optical biometer and the predicate device will be assessed for the following measures:
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Subjects will be followed for the duration of the procedure, up to one day.
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Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Evaluation of Adverse Events Found During the Study
Tidsramme: Subjects will be followed for the duration of the procedure, up to one day.
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The safety endpoint is to evaluate any adverse events associated with the Nidek optical biometer or the predicate or reference devices.
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Subjects will be followed for the duration of the procedure, up to one day.
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Andre resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Additional Analyses for the Agreement Portion of the Study
Tidsramme: Subjects will be followed for the duration of the procedure, up to one day.
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Additional analyses will examine the intraocular lens (IOL) power calculation from the Nidek optical biometer only based on the subjects enrolled in the agreement portion of the study.
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Subjects will be followed for the duration of the procedure, up to one day.
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Samarbejdspartnere og efterforskere
Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.
Sponsor
Efterforskere
- Ledende efterforsker: Karl G Stonecipher, M.D., Physicians Protocol
Datoer for undersøgelser
Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.
Studer store datoer
Studiestart
1. december 2012
Primær færdiggørelse (Faktiske)
1. april 2013
Studieafslutning (Faktiske)
1. maj 2013
Datoer for studieregistrering
Først indsendt
7. november 2012
Først indsendt, der opfyldte QC-kriterier
14. november 2012
Først opslået (Skøn)
21. november 2012
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
28. juni 2013
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
26. juni 2013
Sidst verificeret
1. juni 2013
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- AL-3
Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .