Study of the Cell Response in the Tear Film After Overnight Contact Lens Wear (CORNWALL)
Polymorphonuclear Leukocyte Response During Overnight Lens Wear
Panoramica dello studio
Stato
Stato
Condizioni
Condizioni
Intervento / Trattamento
Intervento / Trattamento
Descrizione dettagliata
Tipo di studio
Tipo di studio
Iscrizione (Effettivo)
Iscrizione
Fase
Fase
- Non applicabile
Contatti e Sedi
Luoghi di studio
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Ontario
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Waterloo, Ontario, Canada, N2L 3G1
- University of Waterloo Centre for Contact Lens Research
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Criteri di partecipazione
Criteri di ammissibilità
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
Inclusion Criteria:
- 17 years of age or older.
- Ocular examination in the last two years.
- Has up-to-date spectacles.
Falls into one of the following three categories:
- Adapted wearer of Lotrafilcon A contact lenses
- Adapted wearer of Lotrafilcon B contact lenses
- Does not wear contact lenses
- Other protocol-defined inclusion criteria may apply.
Exclusion Criteria:
- Ocular disease
- Systemic or topical medications that may affect ocular health.
- Known sensitivity to diagnostic pharmaceuticals used in study.
- Uses artificial tears and/or rewetting drops.
- Wears contact lenses on an overnight basis for more than one night per week.
- Other protocol-defined exclusion criteria may apply.
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Scienza basilare
- Assegnazione: Non randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Separare
Numero di armi
Armi e interventi
Gruppo di partecipanti / ArmGruppo di partecipanti / Arm |
Intervento / TrattamentoIntervento / Trattamento |
|---|---|
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Comparatore attivo: Lotrafilcon A
Lotrafilcon A contact lenses worn on a daily wear basis for 1 week, followed by 8 hours overnight wear in a replacement pair.
After a 12-hour washout period, a new pair of lotrafilcon A contact lenses were dispensed for 4 weeks of daily wear, followed by 8 hours overnight wear.
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Commercially marketed, silicone hydrogel, single-vision contact lens FDA-approved for daily and extended (overnight) wear for up to 30 nights.
Altri nomi:
Hydrogen peroxide-based contact lens care system for nightly cleaning and disinfection of study lenses
Altri nomi:
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Comparatore attivo: Lotrafilcon B
Lotrafilcon B contact lenses worn on a daily wear basis for 1 week, followed by 8 hours overnight wear in a replacement pair.
After a 12-hour washout period, a new pair of lotrafilcon B contact lenses were dispensed for 4 weeks of daily wear, followed by 8 hours overnight wear.
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Hydrogen peroxide-based contact lens care system for nightly cleaning and disinfection of study lenses
Altri nomi:
Commercially marketed, silicone hydrogel, single-vision contact lens FDA-approved for daily or extended (overnight) wear up to 6 nights.
Altri nomi:
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Nessun intervento: No lens wear
No contact lens wear for the duration of the study.
One 8-hour sleep at 1 week, followed by an 8-hour sleep 4 weeks later.
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Leukocyte Population
Lasso di tempo: Week 5
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A tear sample was collected after 8 hours of sleep using an ocular surface cell collection apparatus (OSCCA).
Different types of white blood cells (leukocytes) were identified, which included neutrophils, monocytes, and lymphocytes.
The total amount of leukocytes for contact lens wearers and non-lens wearers is presented.
Potential differences in leukocyte count between lens wearers and non-lens wearers may indicate a different immune response.
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Week 5
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Relative Cell Adhesion Response of Polymorphonuclear Leukocytes (PMNs)
Lasso di tempo: Week 5
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A tear sample was collected after 8 hours of sleep using an ocular surface cell collection apparatus (OSCCA) and analyzed on a flow cytometer.
CD54 is a protein typically found in the cell membrane of leukocytes, which up-regulates during inflammation and promotes cell adhesion.
Cell adhesion response is reported as a ratio of stimulated to non-stimulated samples.
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Week 5
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Relative Oxidative Response of Polymorphonuclear Leukocytes (PMNs)
Lasso di tempo: Week 5
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A tear sample was collected after 8 hours of sleep using an ocular surface cell collection apparatus (OSCCA) and analyzed on a flow cytometer.
Oxidative response is reported as a ratio of activated to non-activated samples.
DCF (dichlorofluorescein diacetate) is a molecular probe that measures the oxidative burst.
Upon stimulation, the PMNs synthesize reactive oxygen species, such as superoxide or hydrogen peroxide, which is detected by the probe.
Differences in the oxidative response between contact lens wearers and non-lens wearers is indicated by a shift in the ratio (stimulated/unstimulated).
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Week 5
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Change From Week 1 in Leukocyte Population at Week 5
Lasso di tempo: Week 1, Week 5
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A tear sample was collected after 8 hours of sleep using an ocular surface cell collection apparatus (OSCCA).
Different types of white blood cells (leukocytes) were identified, which included neutrophils, monocytes, and lymphocytes.
The difference between total leukocytes for contact lens wearers and non-lens wearers (Week 5 minus Week 1) is presented.
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Week 1, Week 5
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Change From 1 Week in Relative Cell Adhesion Response of PMNs at Week 5
Lasso di tempo: Week 1, Week 5
|
A tear sample was collected after 8 hours of sleep using an ocular surface cell collection apparatus (OSCCA) and analyzed on a flow cytometer.
Cell adhesion response is reported as a ratio of activated to non-activated samples.
The difference between the ratio data for contact lens wearers and non-lens wearers (Week 5 minus Week 1) is presented.
|
Week 1, Week 5
|
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Change From Week 1 in Relative Oxidative Response of PMNs at Week 5
Lasso di tempo: Week 1, Week 5
|
A tear sample was collected after 8 hours of sleep using an ocular surface cell collection apparatus (OSCCA) and analyzed on a flow cytometer.
Oxidative response is reported as a ratio of activated to non-activated samples.
The difference between the ratio data for contact lens wearers and non-lens wearers (Week 5 minus Week 1) is presented.
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Week 1, Week 5
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Collaboratori e investigatori
Sponsor
Sponsor
Collaboratori
Collaboratori
Investigatori
Investigatori
- Investigatore principale: Lyndon Jones, PhD FCOptom FAAO, Director, Centre for Contact Lens Research, School of Optometry, University of Waterloo
Studiare le date dei record
Studia le date principali
Inizio studio
Inizio studio
Completamento primario (Effettivo)
Completamento primario
Completamento dello studio (Effettivo)
Completamento dello studio
Date di iscrizione allo studio
Primo inviato
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Stima)
Primo Inserito
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
Ultimo aggiornamento pubblicato
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Altri numeri di identificazione dello studio
Altri numeri di identificazione dello studio
- P-373-C-102
Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .