Corneal Asphericity Adjustment (Q Adjustment) in Myopic and Hyperopic Patients Undergoing Refractive Correction With Excimer Laser

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT01296867

Enrollment

Registered

2011-02-16

Start date

2006-03-31

Completion date

2009-05-31

Last updated

2011-02-16

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hyperopia, Myopia

Keywords

Laser ablation algorithms, Excimer laser, Refractive correction, Corneal Asphericity Adjustment

Brief summary

To study the postoperative results in myopic and hyperopic eyes treated with two different laser ablation algorithms (STD and F-CAT), both FDA approved.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Healthy volunteers

Yes

Inclusion criteria

* Myopic and hyperopic eyes eligible for LASIK or PRK refractive correction * Central corneal thickness more than 500 micrometers

Exclusion criteria

* Topographies of less than 55% of successful total sampled area and eyes exhibiting asphericity variations, in either the horizontal or the vertical axis, greater than 0.2 * Corneal scarring * Cataract surgery * Corneal ulceration * Topographical abnormalities

Outcome results