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This study aims to investigate the impact of improved capsular polishing on the long-term stability of effective lens position (ELP) and visual quality in patients following femtosecond laser-assisted cataract surgery combined with intraocular lens implantation. Throughout the follow-up period, changes in ELP were observed using OCT to measure the central corneal posterior surface to the IOL anterior surface. The contraction of the anterior capsule orifice was assessed through anterior segment photography, and its diameter and area were measured and analyzed using drawing software at each follow-up visit. Additionally, the investigators analyzed the correlation between the degree of anterior capsule orifice contraction and ELP, as well as examined whether ACO formed and its degree, PCO formation and its degree. Objective examination using OQAS II was conducted to measure PSF, MTF, OSI, and SR of patients; high-order aberrations including astigmatism, trifolium, and spherical aberration were measured by OPD-Scan III. Furthermore, the investigators investigated the correlation between ACO/PCO degrees and visual quality.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| polished | Active Comparator | The polished group did the improved capsular polishing. |
|
| control | Placebo Comparator | The control group did not undergo improved polishing, the conventional I/A polishing the capsule instead. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| improved capsular polishing | Procedure | In the polished group,utilize the OVDs to partially fill the peripheral capsule, causing the central posterior capsule to bulge, and then employ the double-ended Whitman Shepherd capsular polisher to meticulously polish both the anterior and equator of the capsule. This process also allows for simultaneous polishing of a portion of the posterior capsule. By rotating the polisher 180°along one side, followed by switching ends to cover the remaining 180° range, even the main incision site can be effectively addressed due to its curved tip design. |
| Measure | Description | Time Frame |
|---|---|---|
| visual acuity | Utilize decimal visual acuity charts for assessment purposes and record the findings in LogMAR format to facilitate statistical analysis. | The data were collected at various time points for follow-up: preoperative, 1-day postoperative, 1-week postoperative, 1-month postoperative, 3-month postoperative, 6-month postoperative, and 1-year postoperative. |
| strehl ratio(SR) | This is one of the visual quality indicators. It's assessed by OQAS II instrument. SR that represents the ratio of the central peak value of the point spread function in an aberration-free system to that in a aberration system with the same pupil diameter, the higher the value is, the better the optical quality is. | The data were collected at various time points for follow-up: preoperative, 1-day postoperative, 1-week postoperative, 1-month postoperative, 3-month postoperative, 6-month postoperative, and 1-year postoperative. |
| modulation transfer function cutoff frequency (MTF cutoff) | MTF cutoff that characterizes the spatial frequency corresponding to the minimum resolution of human eyes in the modulation transfer function curve, and the higher the value is, the better the optical quality becomes,and it is immune to subjective factors and provides an objective assessment of the optical imaging quality across the entire refractive system of the artificial lens eye. | The data were collected at various time points for follow-up: preoperative, 1-day postoperative, 1-week postoperative, 1-month postoperative, 3-month postoperative, 6-month postoperative, and 1-year postoperative. |
| objective scatter index (OSI) | OSI that objectively reflects the scatter of the refractive medium,a higher OSI ratio indicates a more severe degree of scatter in the patient. | The data were collected at various time points for follow-up: preoperative, 1-day postoperative, 1-week postoperative, 1-month postoperative, 3-month postoperative, 6-month postoperative, and 1-year postoperative. |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Xin Zhou | Xi'an | Shaanxi | 710000 | China |
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The intervening measure is utilize the OVDs to partially fill the peripheral capsule, causing the central posterior capsule to bulge, and then employ the double-ended Whitman Shepherd capsular polisher to meticulously polish both the anterior and equator of the capsule. By rotating the polisher 180°along one side, followed by switching ends to cover the remaining 180° range, even the main incision site can be effectively addressed due to its curved tip design.
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|
| the conventional I/A polishing | Procedure | the conventional I/A polishing the capsule |
|
| ID | Term |
|---|---|
| D002386 | Cataract |
| ID | Term |
|---|---|
| D007905 | Lens Diseases |
| D005128 | Eye Diseases |
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