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Not yet recruitingNCT05834465Updated Jun 29, 2023

High Intraocular Pressure After Cataract Surgery

An observational study in Cataract and Intraocular Pressure, sponsored by Wenzhou Medical University. Not yet recruiting at 1 site in China. Open to participants aged 60 Years and older. Per ClinicalTrials.gov, last updated 2023-06-29.

Sponsored by Wenzhou Medical University · Observational

From the registry’s dates

  • Primary completion was expected by Sep 2023, 3 years 2 months ago, but the record still lists the study as not yet recruiting.
Study type
Observational
Model
Case-only
Time perspective
Prospective
Enrollment
60
Ages
60 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 32 studies in Cataract by Wenzhou Medical University — 3 open to participants now, 6 under way, none of them phase 3. Cataract · Wenzhou Medical University.

Planned enrollment
10th of 18
60 · median 61
Started
2023
the only one that year
Observational
18 of 32
2 open now
Registered
28th of 32
by date

Among the 32 studies in Cataract by Wenzhou Medical University, this one is the 10th largest by planned enrollment of the 18 observational ones that give a count, is the only one that started in 2023, is one of 18 observational ones, and was the 28th registered.

Cataract

1,630 studies on the registry are indexed under Cataract; 235 are open to participants now.

Browse Cataract studies →

Open to participants now

3 of the 32 studies in Cataract by Wenzhou Medical University are open now, in 1 country. Recruiting first, the newest first:

By country, each count listing its studies:

All 3 open studies →

Where they have run

Who these studies take

Of the 142 Cataract studies recruiting now, 88 (62%) set no upper age limit and 8 (6%) stop at 75 or younger; 10 take children under 18; 16 take healthy volunteers.

This study: 60 Years and older · all sexes · no healthy volunteers.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 32 studies in Cataract by Wenzhou Medical University, or all of them as a file.
02

Study summary

Effectiveness of anterior chamber drainage on the structure of the anterior chamber, the position of the intraocular lens and the shape of the corneal incision in the early stage of cataract surgery with high intraocular pressure

Read the detailed description

To explore the effect of different degrees of anterior chamber drainage on the structure of the anterior chamber, the position of the intraocular lens and the shape of the corneal incision in the early stage of cataract surgery with high intraocular pressure

03

Conditions studied

  • Cataract
  • Intraocular Pressure

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04

Who can participate

Ages eligible
60 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Probability sample

Study population

Included in Eye Hospital of Wenzhou Medical University for "phacoemulsification combined with intraocular lens implantation" 2 hours after using a non-contact tonometer (FT-1000, TOMEY, JAPAN) to check that the intraocular pressure exceeds 28mmHg accompanied by corneal edema, anterior chamber radiation and age-related cataract patients over 60 years of age is required.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Patients over 60 years old who underwent simple age-related cataract surgery in Eye Hospital of Wenzhou Medical University, the operation was successful, and there were no intraoperative complications such as posterior capsule rupture;
  2. Measurements were taken before and after drainage, and all data were complete ;
  3. The patient agrees and accepts the study.

Exclusion criteria

Exclusion Criteria:

  1. Preoperative glaucoma, ocular hypertension, iritis, uveitis and other eye diseases, as well as other eye diseases and serious systemic diseases that may affect the prognosis of surgery, such as corneal lesions, vitreous volume blood, retinal detachment, poor blood sugar control in diabetes, etc.
  2. Previous history of eye trauma, etc.
  3. Cannot cooperate with the completion of intraocular pressure measurement and CASIA2 examination.
05

Study design

Observational model
Case-only
Time perspective
Prospective
Enrollment
60 participants (estimated)
Patient registry
No

Groups and cohorts

  • Group 1

    After using a non-contact tonometer to measure, the intraocular pressure is reduced by 0-10mmHg.

  • Group 2

    After using a non-contact tonometer to measure, the intraocular pressure is reduced by 10-20mmHg.

  • Group 3

    After using a non-contact tonometer to measure, the intraocular pressure is reduced over 20mmHg.

06

What researchers measure

Primary outcomes

  1. The position of IOL through tilt (tilt in degree)

    Evaluation of the position of IOL through tilt (tilt in degree)

    Time frame: Two hours after cataract surgery (i.e. before anterior chamber drainage)

  2. The position of IOL through decentration (decentration in millimeter)

    Evaluation of the position of IOL through decentration (decentration in millimeter)

    Time frame: Two hours after cataract surgery (i.e. before anterior chamber drainage)

  3. The position of IOL through tilt (tilt in degree)

    Evaluation of the position of IOL through tilt (tilt in degree)

    Time frame: Immediately after anterior chamber drainage

  4. The position of IOL through decentration (decentration in millimeter)

    Evaluation of the position of IOL through decentration (decentration in millimeter)

    Time frame: Immediately after anterior chamber drainage

07

Study locations

1 site
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Start is estimated for Jul 2023; primary completion for Sep 2023, 2 months later.

Of 167 non-industry observational studies under Cataract, half reached primary completion within 19 months of starting (the median), counting those still running; a quarter within 9 and three quarters within 30. This study's planned 2 months is below that.

Counting every sponsor, half of 234 studies reached it within 16 months; a quarter within 9 and three quarters within 30.

How these figures are worked out, and which studies are left out of them.

Registered
Mar 24, 2023
First posted
Apr 28, 2023
StartEst.
Jul 1, 2023
Primary completionEst.
Sep 1, 2023
CompletionEst.
Oct 1, 2023
Last update
Jun 29, 2023
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jun 29, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05834465
Lead sponsor
Wenzhou Medical University
Responsible party
Yune Zhao (Principal Investigator, Wenzhou Medical University) — Principal investigator
First posted
Apr 28, 2023
Start date
Jul 1, 2023 (estimated)
Primary completion
Sep 1, 2023 (estimated)
Completion
Oct 1, 2023 (estimated)
Last update
Jun 29, 2023

Study contacts

Pingjun Chang
Contact
364669877@qq.com
18868410303

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is not yet recruiting, as verified in Jun 2023. You cannot join it, but the record below documents what was studied.

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Discussion

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