Study of Subluxation Lens Biometrics and Postoperative Intraocular Lens Stability
Trial Snapshot
- Phase
- Not Applicable
- Sponsor
- Enrollment
- 60
- Locations
- 1
- Primary Endpoint
- The tilt angle of the intraocular lens
Study Overview
Brief Summary
To compare the accuracy of four lens diameter measurement methods and to study the influencing factors of intraocular lens deviation after operation
Study Design
- Study Type
- Observational
- Observational Model
- Ecologic Or Community
- Time Perspective
- Prospective
Eligibility Criteria
- Ages
- 20 Years to 88 Years (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •(1) Subluxation of the lens is less than 180 degrees; (2) Part of the edge of the lens can be seen in the pupil area after the pupil is dilated
Exclusion Criteria
- •(1) Total dislocation of the lens to the vitreous cavity (2) Patients with small eyeballs and small eyelid fissures (3) Patients younger than 18 years old (4) Congenital cataracts in both eyes (5) Corneal dystrophy or endothelial cell insufficiency (6) Chronic uvea Inflammation (7) Progressive fundus disease (8) Fragile capsular bag (9) Retinitis pigmentosa or pseudocapsular exfoliation syndrome
Outcomes
Primary Outcomes
The tilt angle of the intraocular lens
Time Frame: 3 month postoperation
The angle between the plane of the lens and the plane of the pupil is the inclination of the lens
The eccentric distance of the intraocular lens
Time Frame: 3 month postoperation
The distance between the center of the lens plane and the center of the pupil plane is the eccentric distance of the lens.
Lens diameter
Time Frame: through study completion, an average of 1 year
Measured by related instruments before surgery and calculated by the circumference of the tension ring in the surgical video screenshot
Secondary Outcomes
No secondary outcomes reported