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MTF Image Modifications

NCT01926704 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 30

Last updated 2014-02-19

No results posted yet for this study

Summary

Human visual acuity and contrast sensitivity are highly dependent on various different parameters. Each should be optimized for perfect visual performance. However, in real life our eyes lack such parameters, which might lead to unsatisfying results even after spectacle correction or contact lenses.

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.

Conditions

  • Modulation Transfer Function
  • Visual Acuity
  • Contrast Sensitivity

Sponsors & Collaborators

  • Medical University of Vienna

    lead OTHER

Eligibility

Min Age
18 Years
Max Age
35 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2013-10-31
Primary Completion
2013-10-31

Countries

  • Austria

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01926704 on ClinicalTrials.gov