Cataract Clinical Trial
Official title:
Safety and Efficacy of Astigmatism Correction by Iris-registration Guided Corneal Relaxing Incisions or Toric IOL Implantation During Femtosecond Laser-assisted Cataract Surgery
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.
Status | Not yet recruiting |
Enrollment | 50 |
Est. completion date | December 2023 |
Est. primary completion date | December 2023 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 18 Years to 95 Years |
Eligibility | 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 |
Country | Name | City | State |
---|---|---|---|
United States | Kenneth J Rosenthal, MD PC | New York | New York |
Lead Sponsor | Collaborator |
---|---|
Kenneth J Rosenthal | Johnson & Johnson Surgical Vision, Inc. |
United States,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Other | Percentage of eyes with residual refractive astigmatism within 0.5 D | Frequency distribution of postoperative refractive astigmatism | postoperative 3 months | |
Other | Proportion of eyes with uncorrected distance visual acuity 20/x or better | Frequency distribution of the proportion of eyes achieving postoperative uncorrected distance visual acuity 20/x or better | Postoperative 3 months | |
Other | Spherical equivalent refractive accuracy | Proportion of eyes with postoperative MRSE within 0.50 and 1.00 D | 3 months postoperatively | |
Primary | Mean postoperative astigmatism | Mean postoperative astigmatism | postoperative 3 months | |
Secondary | Mean monocular uncorrected distance visual acuity | Postoperative mean monocular uncorrected distance visual acuity | 3 months postoperatively | |
Secondary | Mean monocular corrected distance visual acuity | Postoperative mean monocular corrected distance visual acuity | 3 months postoperatively |
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