Study Results
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Basic Information
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COMPLETED
30 participants
OBSERVATIONAL
2013-10-31
Brief Summary
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A promising approach would be to design intra ocular lenses (IOL), which are implanted into the eye for example in the course of cataract extraction and are able to compensate for the human eyes' aberrations.
For example cutoff frequency, edge-sharpness or specific contrast for selected structure sizes would need to be considered. Since, an aberration free optical system is almost impossible and since the impact of each single parameter is not yet known, IOL design parameters would have to be chosen very carefully.
Furthermore, image quality of IOLs still is tested ex vivo by ray tracing for example, but this does not guarantee perfect function after implantation, as our visual system has complex image precessing units form the retina to the brain.
The present study picks one of these parameters and seeks to assess its impact on visual quality in-vivo. By subjectively grading different images with objective changes to image quality by variations of the modulation transfer function (MTF), the potential influence and thus on our subjective visual impression shall be assessed.
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Detailed Description
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Conditions
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Study Design
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COHORT
PROSPECTIVE
Study Groups
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healthy, young subjects
No interventions assigned to this group
Eligibility Criteria
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Inclusion Criteria
* Normal findings in the medical history and physical examination unless the investigator considers an abnormality to be clinically irrelevant
* Normal ophthalmic findings, emmetropia or ≤ 1 diopter
Exclusion Criteria
* Treatment in the previous 3 weeks with any drug (except oral contraceptives)
* Symptoms of a clinically relevant illness in the 3 weeks before the first study day
18 Years
35 Years
ALL
Yes
Sponsors
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Medical University of Vienna
OTHER
Responsible Party
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Gerhard Garhofer
assoc. Prof. Dr.med.univ.
Locations
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Department of Clinical Pharmacology, Medical University of Vienna
Vienna, Vienna, Austria
Countries
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Other Identifiers
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OPHT - 210613
Identifier Type: -
Identifier Source: org_study_id
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