Capsulorhexis
Conditions
Keywords
capsulorhexis, IOL centration
Brief summary
The study compares anatomic outcomes of Intra Ocular Lens(IOL) placement with two methods of centration of the capsulorhexis- scanned capsule centration and pupil centration. It is hypothesized that scanned capsule centration provides more uniform(25% better) overlap of capsulorhexis margin over IOL optic compared to pupil centration.
Detailed description
50 consecutive eyes undergoing cataract surgery will be studied. 25 eyes will have scanned capsule centration and 25 will have pupil centration. Retroillumination slitlamp photographs will be taken 10-30 days after surgery with dilated pupils. The amount of capsule overlapping the IOL will be documented. The horizontal, vertical and symmetricity of overlap will be calculated. Each group will have 20 eyes with an additional 5 eyes in each group to account for drop outs or poor quality images.
Interventions
PROCEDUREcapsulorhexis
Sponsors
OptiMedica Corporation
Northwestern University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
DIAGNOSTIC
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
45 Years to 95 Years
Healthy volunteers
Yes
Inclusion criteria
* Patients with cataracts * Same variety of IOL inserted in all eyes
Exclusion criteria
* Previous glaucoma or retinal surgery * Pupil not dilating beyond 6mm * Zonular weakness or pseudoexfoliation * Extensive corneal scarring * High refractive error: Myopia greater than 10D, Hyperopia greater than 5D
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Overlap of the Continuous Curvilinear Capsulorhexis margin over the IOL | 10-30 days post surgery | The horizontal and vertical overlap will be calculated. Horizontal overlap= Overlap of the temporal half versus the nasal half Vertical overlap= overlap of the superior half versus the inferior half of the IOL. Symmetricity of overlap= Horizontal overlap/vertical overlap |
Countries
United States
Outcome results
None listed