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A Pilot Study Simulating Multifocal Intraocular Lenses in Healthy Subjects

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. Identifier: NCT01873781
Recruitment Status : Completed
First Posted : June 10, 2013
Last Update Posted : August 29, 2013
Information provided by (Responsible Party):
Gerhard Garhofer, Medical University of Vienna

Brief Summary:

Age related cataracts are responsible for about 51 percent of blindness worldwide and according to the WHO affect about 20 million people, according to the WH . As cataract surgery is firstline treatment in the western world, there is a constant attempt to improve artificial intraocular lenes (IOL).

As for this study, the investigators seek to compare four different IOL designs in in a psychophysiological setting, allowing to assess the impact of these IOLs on vision and psychological processing of visual information.

As these IOLs also have downsides, such as reduced light intensity or image alterations, the subjective preference and overall impression shall be investigated. The healthy subjects look through a stable spectacle frame mounted onto a table, which enables the investigator to insert the different IOLs. This would allow subjective testing of IOLs before surgery.

Condition or disease Intervention/treatment
Lenses, Intraocular Contrast Sensitivity Visual Acuity Drug: Cyclopentolatehydrochloride

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Study Type : Observational
Actual Enrollment : 30 participants
Observational Model: Cohort
Time Perspective: Prospective
Study Start Date : April 2013
Actual Primary Completion Date : July 2013
Actual Study Completion Date : July 2013

Group/Cohort Intervention/treatment
30 healthy male and female subjects
30 healthy male and female subjects aged 18-35
Drug: Cyclopentolatehydrochloride
Cyclopentolatehydrochloride 0.5% (Thilo, Alcon, Vienna), dose: 1 drop for study eye

Primary Outcome Measures :
  1. Eearly Treatment Diabetic Retinopathy Study (ETDRS) visual acuity score [ Time Frame: 1 study day ]
    To investigate the psychophysiological impact of different optical setups on visual acuity at far, intermediate and near distance.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 35 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
young healthy subjects

Inclusion Criteria:

Men and women aged between 18 and 35 years

  • Normal findings in the medical history unless the investigator considers an abnormality to be clinically irrelevant
  • Normal ophthalmic findings, between -1 and +1 diopters

Exclusion Criteria:

  • > 0,5 diopters of cylinder
  • Abuse of alcoholic beverages, participation in a clinical trial in the 3 weeks preceding the study
  • Symptoms of a clinically relevant illness in the 3 weeks before the first study day

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01873781

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Department of Clinical Pharmacology, Medical University of Vienna
Vienna, Austria, 1080
Sponsors and Collaborators
Medical University of Vienna
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Responsible Party: Gerhard Garhofer, assoc. Prof., Medical University of Vienna Identifier: NCT01873781    
Other Study ID Numbers: OPTH-200912
First Posted: June 10, 2013    Key Record Dates
Last Update Posted: August 29, 2013
Last Verified: August 2013
Additional relevant MeSH terms:
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Immune System Diseases