Trial · NCT07889752
VEP for Assessment SMILE Visual Quality
NCT07889752, Completed, yuhao shao
3 sourcestrials-2026-11-12-0.5.0
Cite this record
ConductScience Library. VEP for Assessment SMILE Visual Quality. Trials, record NCT07889752. Release trials-2026-11-12-0.5.0, 12 Nov 2026. https://conductscience.org/library/trials/NCT07889752
On this page
Trial
As registered on ClinicalTrials.gov, in the graph's capture of the registry.
- Title
- VEP for Assessment SMILE Visual Quality
- NCT number
- NCT07889752
- Status
- Completed
- Enrollment
- 84 participants, actual
- Lead sponsor
- yuhao shao
- Conditions
- Myopia
- Interventions
- small incision lenticule extraction (SMILE)
- First posted
- 2026-10-22
- Last updated
- 2026-10-30
Source ClinicalTrials.gov
Registered outcomes4
Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.
| List | Outcome | Time frame | Description |
|---|---|---|---|
| Primary | Ocular aberration measurements | Before the operation, 1 week after the operation, 1 month after the operation, 3 months after the operation, 6 months after the operation | Data collection involved consecutive corneal topography assessments using the Orbscan II device (Bausch \& Lomb). Subsequently, ocular aberration evaluations were conducted with a Hartmann-Shack aberrometer (Zywave, Bausch \& Lomb). The ocular aberration data analysis, including high order aberration (HOA), spherical aberration (SA), and coma, was based on a pupil diameter of 6mm. |
| Primary | Contrast sensitivity evaluations | Before the operation, 1 week after the operation, 1 month after the operation, 3 months after the operation, 6 months after the operation | CS assessments were performed employing the CSV-1000E (Vector Vision Co., Greenville, Ohio, USA) both prior to surgery and at 1 week, 1 month, 3 months, and 6 months post-surgery. Evaluations were conducted under photopic and mesopic conditions across spatial frequencies of 3, 6, 12, and 18 cycles per degree (cpd). |
| Primary | Visual evoked potential measurements | Before the operation, 1 week after the operation, 1 month after the operation, 3 months after the operation, 6 months after the operation | The Pattern Visual Evoked Potential (P-VEP) test was conducted using the ROLAND visual electrodiagnostic test system (Germany). Testing took place in a dark, soundproof room where patients were seated comfortably one meter away from the screen. Patients were encouraged to relax and concentrate on the central fixation light throughout the examination. Pattern-reversal VEP acquisition followed International Society for Clinical Electrophysiology of Vision (ISCEV) recommendations7. The VEP was elicited using two check sizes (1° and 15'). N75 peak time, P100 peak time, and P100 amplitude were measured by 3 technicians, and the final value was the average of the 3 measurements. |
| Secondary | Quality of vision questionnaires | Before the operation, 1 week after the operation, 1 month after the operation, 3 months after the operation, 6 months after the operation | The Quality of Vision (QoV) Questionnaire was translated into Chinese and completed by patients prior to surgery, as well as 1 week, 1 month, 3 months, and 6 months post-surgery. |
Source ClinicalTrials.gov
Outcomes0
Each outcome the trial posted results for, in ClinicalTrials.gov's words.
None in this release.
Results by group0
Each measurement the trial posted, group by group, in the words and numbers it posted.
None in this release.
Participant flow0
How many started, completed or left each group, period by period.
None in this release.
Adverse events0
Each adverse event the trial posted, group by group: the participants affected out of those at risk.
None in this release.
Adverse event totals0
The totals the trial posted for each group.
None in this release.
Papers0
The papers the trial lists on ClinicalTrials.gov.
None in this release.
Grants0
The grants NIH RePORTER links to the trial, newest funded first: NIH's, and some of AHRQ's, CDC's, FDA's and VA's. Each shows its title, principal investigators, organization and funder in its newest year.
None in this release.
Trial comparisons0
Comparisons of the trial's two groups, calculated by ConductScience from the counts it posted.
None in this release.
Tests0
The ConductCognition tests this trial's registered outcomes name, as ScienceGraph matched them in trial-tests-2026-11-12-0.2.1.
None in this release.
Data dates
The day each source was copied for this release.
Sources 3
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
- NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
- NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.
For software
Read this trial from software.
The record and each of its lists are JSON, twenty rows a page. No key.
GET https://conductscience.org/api/trials/v1/NCT07889752
GET https://conductscience.org/api/trials/v1/NCT07889752/registered