Visual and Optics Impact of Refractive Surgery

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

COMPLETED

Total Enrollment

60 participants

Study Classification

OBSERVATIONAL

Study Start Date

2015-06-30

Study Completion Date

2018-03-15

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

Refractive surgery includes interventions to correct refractive errors, using a medical device such as a laser or an implant (intraocular lenses) or surgical instruments. The study distinguishes corneal interventions, carried on the surface of the eye, and intraocular interventions, performed on the lens or in the anterior or posterior chamber of the eye. The number of procedures in refractive surgery is growing significantly. They seem to offer satisfactory visual results but a number of issues remains unresolved. In order to get emmetropia, refractive surgery corrects optical defects by decreasing aberrations of lower orders (ie spherical refractive error and astigmatism). This increases high-order aberrations (the most common is a bright halo on the edge of the image). The cutting of the flap to the surface of the cornea in the case of LASIK increases high-order aberrations, which have the effect of reducing post-surgical visual performance (ie visual acuity and contrast sensitivity) and can't be corrected by glasses, while the adaptation of contact lenses on a post-operative cornea is more complex. It is therefore necessary to limit these post-surgical aberrations and to identify their possible sources. Indeed, some authors have provided insight into the effects of some high-order aberrations, but the influence of several factors characterizing the preoperative eye on refractive surgery are still unknown, such as pupillary diameter, depth of the anterior chamber, Intra Ocular Pressure or astigmatism.

Related Clinical Trials

Explore similar clinical trials based on study characteristics and research focus.

Clinical Study to Evaluate the Visual Performance of Three Multifocal IOLs

NCT02990689

Visual Acuity

COMPLETED NA

Visual Performance Following Implantation of Presbyopia Correcting IOLs

NCT04907955

Loss of Visual Contrast Sensitivity Near Vision Visual Impairment

COMPLETED NA

Wavefront Guided Scleral Lenses for Keratoconus and Irregular Astigmatism

NCT04698590

Keratoconus Irregular Astigmatism Corneal Ectasia +4 more

ACTIVE_NOT_RECRUITING NA

Impact of Glistenings in AcrySof Intraocular Lenses on Visual Quality

NCT01202981

Lenses, Intraocular Glistenings Visual Quality

COMPLETED

Use of Toric Intraocular Lens to Neutralize Keratometric Astigmatism

NCT00925886

Cataract Astigmatism

TERMINATED NA

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Refractive Disorders

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Observational Model Type

OTHER

Study Time Perspective

PROSPECTIVE

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

Inclusion Criteria

* patient candidate for Laser in Situ Keratomileusis (LASIK) refractive surgery
* 18 to 40 years old
* corrective glasses or lenses ranging from -9.00 to + 6.00 diopter
* astigmatism less than or equal to 5 diopter