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Astigmatism Management With Iris-registration Guided Corneal Relaxing Incisions or Toric IOLs During Cataract Surgery

UnknownNA

Sponsor: Kenneth J Rosenthal

Conditions: Astigmatism, Cataract

Interventions: Femtosecond laser assisted cataract surgery with astigmatism management

Countries: United States

Most of the patients presenting for cataract surgery also have pre-existing corneal astigmatism which if left uncorrected can adversely affect visual and refractive outcomes after cataract surgery. Pre-existing astigmatism at the time of cataract surgery can be corrected by either corneal relaxing incisions or implantation of toric IOLs. While the safety and efficacy of these procedures are well established, there are various challenges associated with these techniques that surgeons need to overcome to achieve good outcomes postoperatively. The use of iris registration technology that automatically compensates for cyclotorsion has the potential to improve the alignment accuracy of CRI or toric IOLs. The Cassini Ambient and Catalys Femtosecond Laser incorporate this technology to help cataract surgeons accurately align toric IOLs on the intended axis of implantation or accurately place CRI on the intended meridian. The present study is aimed at evaluating the efficacy of astigmatism correction during femtosecond laser-assisted cataract surgery with Catalys femtosecond laser. The patients will either undergo iris registration guided CRIs or iris registration guided alignment of toric IOLs.

Eligibility overview

Sex: ALL

Age: 18 Years to 95 Years

Healthy volunteers: No

Study type: INTERVENTIONAL

Eligibility criteria

Inclusion Criteria:

* Patients desirous of undergoing cataract surgery.
* Pre-existing corneal astigmatism requiring either CRIs or toric IOL implantation.
* Patients in whom iris registration link between Cassini Ambient and Catalys femtosecond laser is successful.

Exclusion Criteria:

Patients will be excluded from participating in the study due to any of the following reasons:

* Insufficient pupil dilation to complete Catalys treatment
* Clinically significant corneal pathology precluding reliable Cassini topographical measurement of any cause
* Preoperative corneal astigmatism greater than 4.00 D, or astigmatism requiring both CRIs and implantation of toric intraocular lens for correction.
* Cassini topographical measurement deemed inconsistent with historical topographies and refractive error based on clinical judgment
* Visually significant ocular surface disease (OSD) precluding reliable measurements and/or anticipated to affect refractive stability
* Lid position abnormalities that may affect vision
* Moderate or severe stage glaucoma or optic nerve disease, that would interfere with assessment of or achievement of optimal BCVA
* Visually significant macular disease

Locations (1)

New York, New York, United States