A Prospective Multicenter, Study to Evaluate the Safety and Effectiveness of the Presbyopia Algorithm for Hyperopia and Hyperopic Astigmatism Using LASIK

Technolas Perfect Vision GmbH4 sites in 2 countries80 target enrollmentJune 2009

ConditionsPresbyopia Hyperopia

Overview

Phase: Phase 3
Intervention: Not specified
Conditions: Presbyopia
Sponsor: Technolas Perfect Vision GmbH
Enrollment: 80
Locations: 4
Primary Endpoint: Binocular uncorrected VA better than 20/40
Status: Completed
Last Updated: 14 years ago

Overview Investigators Eligibility Criteria Outcomes Sites Similar Trials

Overview

Brief Summary

The Presbyopia Algorithm subject to this study has been specifically developed to prospectively generate a treatment file for the Technolas 217z100 laser that will provide Presbyopia correction among eyes with primary hyperopia or hyperopic astigmatism (distance correction). The treatment algorithm provides a bilateral, multifocal ablation with a center near addition, thereby allowing good focus over a range of object distances.

Registry

clinicaltrials.gov

Start Date

June 2009

End Date

May 2011

Last Updated

14 years ago

Study Type

Interventional

Study Design

Single Group

Sex

All

Investigators

Sponsor

Technolas Perfect Vision GmbH

Eligibility Criteria

Inclusion Criteria

•Subjects must be at least 18 years old
•Subjects must read, understand, and sign an Informed Consent Form (ICF).
•Subjects must be willing and able to return for scheduled follow up visits.
•Subjects must be willing to have both eyes treated during the same visit.
•Subjects must have up to +4 diopters (D) of absolute spherical hyperopia (not spherical equivalent), with up to +2.5 D of refractive astigmatism (NOT corneal astigmatism) by manifest subjective refraction in both eyes. The spherical equivalent must be no more than +5.25 D.
•Subjects must have presbyopia as determined by an age-related need for optical aid (\> +1.50 D) for reading with their best distance correction.
•Subjects who are contact lens wearers must have gas permeable (GP) lenses discontinued for at least 3 weeks and soft lenses discontinued for at least 1 week prior to the preoperative evaluation in the eye to be treated. Contact lens wearers who wear their contact lenses for any amount of time between the preoperative baseline examination and the operative visit must not be treated.
•Corneal topography should be normal.
•Subjects who are contact lens wearers must have 2 central keratometry readings and 2 manifest subjective refractions taken preoperatively at least one week apart. The refraction values must not differ by more than 0.50D as defined by manifest refraction spherical equivalent (MRSE). The keratometry values must not differ from the previous values by more than 0.50D in either meridian.
•High contrast, manifest, best spectacle-corrected logMAR distance visual acuity (VA) must be correctable to at least 0.1 (20/25 or 6/7.5) in both eyes.

Exclusion Criteria

•Subjects for whom the combination of their baseline corneal thickness and the planned operative parameters for the LASIK procedure would result in less than 250 microns of remaining posterior corneal thickness below the flap postoperatively.
•Eyes for which the baseline manifest subjective refraction exhibits a difference of greater than 0.75D in sphere power, or a difference of greater than 0.50D in cylinder power, or a difference in cylinder axis of more than 15 degrees compared to the baseline cycloplegic subjective refraction. For manifest cylinder of less than 0.75D, the difference in cylinder axis will not be taken into consideration.
•Subjects for whom the preoperative assessment of the ocular topography indicates that one or both eyes are not suitable candidates for treatment based upon the suggested computer-simulated treatment plan.
•Any subject who is going to be co-managed by an ophthalmologist or optometrist who is not approved as a Technolas GmbH Excimer laser Investigator.
•Subjects with anterior segment pathology, including dry eye syndrome and cataracts which in the Investigator's opinion, would interfere with best spectacle-corrected VA (BSCVA) or a successful treatment.
•Subjects with evidence of retinal vascular disease.
•Subjects with any residual, recurrent, or active ocular disease, or corneal abnormality that in the Investigator's opinion would interfere with BSCVA or a successful treatment.
•Subjects with signs of keratoconus.
•Subjects with unstable central keratometry readings with irregular mires.
•Subjects who have undergone previous intraocular or corneal surgery of any kind, including any type of excimer laser surgery for either refractive or therapeutic purposes.