Wavefront Guided Scleral Lenses for Keratoconus & Irregular Astigmatism

Status Active, not recruiting

Clinical Trial Summary

Aberrations are the spreading of light from a point focus. Aberrations of the eyes can be objectively evaluated with a wavefront aberrometer. Lower order aberrations such as defocus and astigmatism can be corrected with glasses and traditional/disposable soft contact lenses. Patients with ectatic corneal disease, such as keratoconus, or irregular astigmatism cause by surgery, trauma or disease, experience vision that is unlikely to be adequately corrected with glasses or disposable soft contact lenses due to higher order aberrations (HOA). HOA's cause halos, flare, glare, starbursts, doubling, smearing or ghosting of vision. Specialty contact lenses, such as scleral lenses, can be used to mask the irregularity of the cornea, reducing HOA's and improving vision. In many patients the resultant vision, though improved, still has some level of residual HOA's affecting the quality of vision. Custom scleral lenses with customized wavefront guided optics can be used to reduce residual HOA's and improve vision further. These lenses have been referred to as higher order aberration correcting scleral lenses or HOA correcting sclerals and wavefront guided scleral lenses or WFG sclerals.

Clinical Trial Description

The purpose of this study is to investigate the effect of an advanced technique for designing custom scleral contact lenses to further improve vision in keratoconus or irregular astigmatism by reducing residual aberrations. The derived custom scleral lenses will include customized aberration correcting optics, guided by a wavefront aberrometer measurements. These lenses are custom made based on the individual measurements from an eye.The primary objective of this study is to evaluate the vision differences between traditional scleral lens optics and customized scleral lens optics. In particular, the investigators will compare efficacy in reducing aberrations and improvement in vision. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT04698590
Study type	Interventional
Source	Cornea and Laser Eye Institute
Contact
Status	Active, not recruiting
Phase	N/A
Start date	January 15, 2021
Completion date	December 31, 2025

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See also
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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Wavefront Guided Scleral Lenses for Keratoconus and Irregular Astigmatism — WFG Sclerals

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms