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Endothelial Bleb Response With Toric Lenses

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00630305
First Posted: March 7, 2008
Last Update Posted: March 3, 2017
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Johnson & Johnson Vision Care, Inc.
February 28, 2008
March 7, 2008
March 26, 2014
 
March 3, 2017
January 2008
July 2008   (Final data collection date for primary outcome measure)
  • Endothelial Bleb Areas on Cornea: Session A- Open Eye [ Time Frame: 20 minutes post-lens insertion ]
    Mean area of endothelial blebs in the following corneal locations: Central, Nasal, Temporal, Inferior, Superior. A masked observer performed the analysis by subjectively selecting a region in a given image that provided an optimal balance of maximum area and clarity of cell outlines. Blebs were then outlined manually and the software calculated the area of blebs. The different sessions are reported showing results for each lens according to the lens worn in the contralateral (contra) eye.Open eye sessions simulated the subjects normal ocular behavior during waking hours; closed eye sessions simulated ocular activity during duration of closed eye activity, such as sleeping. Results are reported as the mean percent difference between the stated test (senofilcon A) and the control lens (alphafilcon A, lotrafilcon B), after 20 minutes of wear, for each testing scenario.
  • Endothelial Bleb Areas on Cornea: Session B- Closed Eye [ Time Frame: 20 minutes post-lens insertion ]
    Mean area of endothelial blebs in the following corneal locations: Central, Nasal, Temporal, Inferior, Superior. A masked observer performed the analysis by subjectively selecting a region in a given image that provided an optimal balance of maximum area and clarity of cell outlines. Blebs were then outlined manually and the software calculated the area of blebs. The different sessions are reported showing results for each lens according to the lens worn in the contralateral (contra) eye.Open eye sessions simulated the subjects normal ocular behavior during waking hours; closed eye sessions simulated ocular activity during duration of closed eye activity, such as sleeping. Results are reported as the mean percent difference between the stated test (senofilcon A) and the control lens (alphafilcon A, lotrafilcon B), after 20 minutes of wear, for each testing scenario.
  • Endothelial Bleb Areas on Cornea: Session C- Open Eye [ Time Frame: 20 minutes post-lens insertion ]
    Mean area of endothelial blebs in the following corneal locations: Central, Nasal, Temporal, Inferior, Superior. A masked observer performed the analysis by subjectively selecting a region in a given image that provided an optimal balance of maximum area and clarity of cell outlines. Blebs were then outlined manually and the software calculated the area of blebs. The different sessions are reported showing results for each lens according to the lens worn in the contralateral (contra) eye.Open eye sessions simulated the subjects normal ocular behavior during waking hours; closed eye sessions simulated ocular activity during duration of closed eye activity, such as sleeping. Results are reported as the mean percent difference between the stated test (senofilcon A) and the control lens (alphafilcon A, lotrafilcon B), after 20 minutes of wear, for each testing scenario.
  • Endothelial Bleb Areas on Cornea: Session D- Closed Eye [ Time Frame: 20 minutes post-lens insertion ]
    Mean area of endothelial blebs in the following corneal locations: Central, Nasal, Temporal, Inferior, Superior. A masked observer performed the analysis by subjectively selecting a region in a given image that provided an optimal balance of maximum area and clarity of cell outlines. Blebs were then outlined manually and the software calculated the area of blebs. The different sessions are reported showing results for each lens according to the lens worn in the contralateral (contra) eye.Open eye sessions simulated the subjects normal ocular behavior during waking hours; closed eye sessions simulated ocular activity during duration of closed eye activity, such as sleeping. Results are reported as the mean percent difference between the stated test (senofilcon A) and the control lens (alphafilcon A, lotrafilcon B), after 20 minutes of wear, for each testing scenario.
Grade of percent of endothelial blebs in the following locations; Central, Nasal, Temporal, Inferior, Superior [ Time Frame: 20 minutes ]
Complete list of historical versions of study NCT00630305 on ClinicalTrials.gov Archive Site
Not Provided
Not Provided
Not Provided
Not Provided
 
Endothelial Bleb Response With Toric Lenses
Evaluation of the Short-Term Corneal Endothelial Response to Wear of Toric Soft Contact Lenses in Asian Eyes
Evaluate the short-term corneal response of oxygen deprivation when using toric contact lenses. The response will be noted by endothelial bleb formation in both open eye and closed eye state.
Interested subjects who meet the entry criteria for the study will be scheduled for four sessions of approximately 30 minutes duration each. Informed consent obtained. Baseline measurements of visual acuity and corneal and conjunctival physiology will be recorded. An examination of the endothelium of the corneas will be conducted using the specular microscope, readings obtained at 5 locations on each cornea: one in the centre and one in each of the superior, inferior, nasal and temporal peripheral regions, approximately 2mm from the limbal margin. The assigned lenses will be inserted according to a fixed-allocation randomization schedule, where each session follows an optimized 2- period simultaneous crossover design, which specifies lenses to be used in each of the four sessions. Lenses will be worn for 20 minutes and then removed. Endothelial specular microscopy will be conducted at 20 minutes with the lenses on. A final evaluation of corneal and conjunctival physiology will be performed prior to subject clearance from the study.
Interventional
Not Provided
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Ametropia
  • Device: alphafilcon A toric
    Subjects that were randomized to receive alphafilcon A toric during one of the four sessions (Sessions A, B, C and D).
  • Device: lotrafilcon B toric
    Subjects that were randomized to receive lotrafilcon B toric during one of the four sessions (Sessions A, B, C and D).
  • Device: senofilcon A toric
    Subjects that were randomized to receive senofilcon A toric during one of the four sessions (Sessions A, B, C and D).
  • Session A
    Subjects were first randomized to a session and then randomized to receive one of four lens sequences for that session. Each subject participated in all four sessions. Session A only contains senofilcon A toric and alphafilcon A toric lenses.
    Interventions:
    • Device: alphafilcon A toric
    • Device: senofilcon A toric
  • Session B
    Subjects were first randomized to a session and then randomized to receive one of four lens sequences for that session. Each subject participated in all four sessions. Session B only contains senofilcon A toric and alphafilcon A toric lenses.
    Interventions:
    • Device: alphafilcon A toric
    • Device: senofilcon A toric
  • Session C
    Subjects were first randomized to a session and then randomized to receive one of four lens sequences for that session. Each subject participated in all four sessions. Session C only contains senofilcon A toric and lotrafilcon B toric lenses.
    Interventions:
    • Device: lotrafilcon B toric
    • Device: senofilcon A toric
  • Session D
    Subjects were first randomized to a session and then randomized to receive one of four lens sequences for that session. Each subject participated in all four sessions. Session D only contains senofilcon A toric and lotrafilcon B toric lenses.
    Interventions:
    • Device: lotrafilcon B toric
    • Device: senofilcon A toric
Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Completed
37
July 2008
July 2008   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  1. Successful soft contact lens wear in daily mode for a minimum of 1 month prior to start of the study without experiencing difficulties or contact lens related complications.
  2. At least 18 years of age and mentally competent to sign an informed consent form.
  3. Healthy eyes and no use of ocular medication.
  4. Similarity of optical parameters between eyes.
  5. Physical appearance typical of Asian eyes

Exclusion Criteria:

  1. A medical or ocular condition that may influence the outcome of this trial.
  2. Current use of ocular/systemic medication that may influence the outcome of this trial.
  3. Failure to wear soft lenses for 2 weeks prior to the start of the study.
  4. Current enrolment or participation in another clinical study.
  5. Current state of pregnancy or breastfeeding
  6. Anisometropia greater than 1.00D (equivalent sphere).
  7. Unequal acuities between eyes (greater than 1 line)
  8. Unequal corneal curvatures (>1.00D)
Sexes Eligible for Study: All
18 Years to 50 Years   (Adult)
Yes
Contact information is only displayed when the study is recruiting subjects
Australia
 
 
NCT00630305
CR-0726
JJO0717
No
Not Provided
Not Provided
Johnson & Johnson Vision Care, Inc.
Johnson & Johnson Vision Care, Inc.
Not Provided
Principal Investigator: Noel A Brennan, McOptom PhD Brennan Consultants
Johnson & Johnson Vision Care, Inc.
January 2017

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP