MTF Image Modifications

Status Completed

Clinical Trial 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.

Clinical Trial Description

n/a

Study Design

Observational Model: Cohort, Time Perspective: Prospective

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT01926704
Study type	Observational
Source	Medical University of Vienna
Contact
Status	Completed
Phase	N/A
Start date	October 2013

View Details

See also
Status	Clinical Trial	Phase
Completed	`NCT06019806` - Effects of Forward Head Posture Correction on Visual Acuity in Low Level Visually Impaired University Students	N/A
Completed	`NCT04567186` - Evaluation of a Daily Disposable Novel Multifocal Contact Lens in a Hyperopic Population	N/A
Completed	`NCT02568254` - Evaluation of Three Daily Disposable Contact Lenses	N/A
Completed	`NCT01951703` - Senofilcon A Investigational Manufacturing Process	N/A
Terminated	`NCT00637468` - EAGLE - Multicenter Study of the European Assessment Group for Lysis in the Eye	Phase 3
Recruiting	`NCT04632901` - A New Parameter for the Assessment of Distance Visual Capacity: the Critical Visual Acuity (CVA)
Active, not recruiting	`NCT03747601` - Temporal Interference Brain Stimulation	N/A
Completed	`NCT06131476` - Clinical Investigation of Visual Acuity in Contact Lens Wearers After Instillation of a Lipid- Based Lubricating Eye Drop	Phase 1
Recruiting	`NCT05414565` - Post-Market Study of Alcon Intraocular Lenses
Completed	`NCT05056870` - Clinical Evaluation of Spherical Soft Contact Lenses, Toric Soft Contact Lenses and Spectacles in Low Astigmats	N/A
Completed	`NCT04615507` - Evaluation of a Daily Disposable Novel Multifocal Contact Lens in a Myopic Population; Part 2	N/A
Completed	`NCT05099380` - Validation of Senofilcon A With New UV / HEV Filter	N/A
Completed	`NCT03713281` - Evaluation of a Toric Multifocal Contact Lens Manufactured in Etafilcon Material in a Low ADD Hyperopic Population
Completed	`NCT05582304` - Role of Glare and Spectral Filtering on Contrast Sensitivity: A Pilot Study	N/A
Completed	`NCT03742271` - Evaluation of Senofilcon A With New UV-blocker on a Neophyte Population	N/A
Completed	`NCT04995055` - Evaluation of Multifocal Contact Lens Designs With and Without an HEV Blocker on Visual Function	N/A
Completed	`NCT05554640` - Clinical Performance of Two Daily Disposable Silicone Hydrogel Contact Lenses	N/A
Completed	`NCT04649606` - Dynamic Characterisation of Meibomian Gland Structure
Completed	`NCT05101252` - Comparison of a Daily Disposable Multifocal Contact Lens to a Marketed Product	N/A
Not yet recruiting	`NCT06054763` - Buyang Huanwu Decoction and Normal Tension Glaucoma	N/A