Tomographic Analysis of Anterior, Posterior, Total Corneal Refractive Power Changes After Laser-assisted Keratotomy

To analyze the effect of femtolaser-assisted keratotomy on corneal astigmatism (anterior, posterior and Total corneal refractive power) measured by Scheimpflug tomography after laser lens surgery.

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Key information

Conditions

Corneal Astigmatism Astigmatism Eye Diseases Refractive Errors

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

About this study

This study investigated patients' eyes with low to moderate total corneal refractive power determined with Scheimpflug tomography (Pentacam HR) after penetrating femtosecond laser-assisted keratotomy (pFLAK) and laser lens surgery. The anterior corneal astigmatism, posterior corneal astigmatism and total corneal refractive power were determined before, 1 month and 3 months after lens surgery. Vector analysis according to the Alpins' method was used to calculate surgically induced astigmatism (SIA).

Who can participate

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Patients who received penetrating femtosecond laser-assisted lens surgery with low to moderate corneal astigmatism

Exclusion criteria

Eyes with irregular corneal astigmatism such as keratoconus, previous corneal surgery, acute or chronic ophthalmic diseases of the anterior segment and intraoperative complications were not included in this study.

Treatment and study plan

Laser keratotomy

Procedure

Penetrating femtosecond laser assisted keratotomy to treat preexisting corneal astigmatism during lens surgery.

Primary outcomes

Change from Baseline Total corneal refractive power at 3 months

Time frame: Before and 3 months after lens surgery

Total corneal astigmatism (anterior and posterior astigmatism)

Secondary outcomes

Change from Baseline Anterior corneal astigmatism at 3 months

Time frame: Before and 3 months after lens surgery

Anterior corneal astigmatism
Change from Baseline Posterior corneal astigmatism at 3 months

Time frame: Before and 3 months after lens surgery

Posterior corneal astigmatism

Sponsors and collaborators

Lead sponsor

University Clinic Frankfurt

Other

Registry information

Official study title

Tomographic Analysis of Anterior, Posterior and Total Corneal Refractive Power Changes After Femtosecond Laser-assisted Keratotomy After Laser Lens Surgery

Important dates

Study start: 2013
Primary completion: 2014
Study completion: 2014
First posted: Mar 31, 2017
Registry last updated: Mar 31, 2017

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed