Study of Subluxation Lens Biometrics and Postoperative Intraocular Lens Stability

Second Affiliated Hospital, School of Medicine, Zhejiang University60 enrolled

Overview

To compare the accuracy of four lens diameter measurement methods and to study the influencing factors of intraocular lens deviation after operation

Study Type

OBSERVATIONAL

Enrollment

Conditions

Subluxation of Lens

Interventions

Phacoemulsification and intraocular lens implantation for cataractPROCEDURE

Phacoemulsification and intraocular lens implantation for cataract

Eligibility

Sex: ALLMin age: 20 YearsMax age: 88 Years

Medical Language ↔ Plain English

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

Locations (1)

Second Affiliated Hospital, Zhejiang University School of Medicine

Hangzhou, Zhejiang, China

Outcomes

Primary Outcomes

Lens diameter

Measured by related instruments before surgery and calculated by the circumference of the tension ring in the surgical video screenshot

Time frame: through study completion, an average of 1 year

The eccentric distance of the intraocular lens

The distance between the center of the lens plane and the center of the pupil plane is the eccentric distance of the lens.

Time frame: 1 week postoperation

The eccentric distance of the intraocular lens

The distance between the center of the lens plane and the center of the pupil plane is the eccentric distance of the lens.

Time frame: 1 month postoperation

The eccentric distance of the intraocular lens

The distance between the center of the lens plane and the center of the pupil plane is the eccentric distance of the lens.

Time frame: 3 month postoperation

The tilt angle of the intraocular lens

The angle between the plane of the lens and the plane of the pupil is the inclination of the lens

Time frame: 1 week postoperation

The tilt angle of the intraocular lens

The angle between the plane of the lens and the plane of the pupil is the inclination of the lens

Time frame: 1 month postoperation

The tilt angle of the intraocular lens

The angle between the plane of the lens and the plane of the pupil is the inclination of the lens

Time frame: 3 month postoperation

Data from ClinicalTrials.gov

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