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To compare the accuracy of four lens diameter measurement methods and to study the influencing factors of intraocular lens deviation after operation
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Phacoemulsification and intraocular lens implantation for cataract | Procedure | Phacoemulsification and intraocular lens implantation for cataract |
| Measure | Description | Time Frame |
|---|---|---|
| Lens diameter | Measured by related instruments before surgery and calculated by the circumference of the tension ring in the surgical video screenshot | 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. | 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. | 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. | 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 | 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 | 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 |
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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
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People whose subluxation of the lens is less than 180 degrees
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Second Affiliated Hospital, Zhejiang University School of Medicine | Hangzhou | Zhejiang | 310009 | China |
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| ID | Term |
|---|---|
| D007906 | Lens Subluxation |
| ID | Term |
|---|---|
| D007905 | Lens Diseases |
| D005128 | Eye Diseases |
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| ID | Term |
|---|---|
| D018918 | Phacoemulsification |
| D019654 | Lens Implantation, Intraocular |
| ID | Term |
|---|---|
| D002387 | Cataract Extraction |
| D054140 | Refractive Surgical Procedures |
| D013508 | Ophthalmologic Surgical Procedures |
| D013514 | Surgical Procedures, Operative |
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| 3 month postoperation |
| D059708 | Ultrasonic Surgical Procedures |