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CompletedNCT02993081RCYAGUpdated Dec 15, 2016

Capsulotomy YAG Laser

An observational study in Refractive and Accommodative Disorders, sponsored by Instituto de Olhos de Goiania. Completed. Per ClinicalTrials.gov, last updated 2016-12-15.

Sponsored by Instituto de Olhos de Goiania · Observational

Study type
Observational
Enrollment
67
Sex
All
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Study summary

Study of refractive changes after capsulotomy with YAG laser in facectomized patients.

Read the detailed description

A retrospective, quantitative study was carried out by analyzing the medical records of a reference ophthalmologic hospital in Goiás. Data from the pre and post YAG laser refractive index data were collected from 67 eyes of 66 patients analyzed in the period from May to November 2016.

We studied 67 eyes of 66 patients , both men and women , and 32 ( 47,7%) underwent myopia after the capsulotomy procedure with YAG laser and 25 ( 37.3%) hypermetropization and 10 (14.9%) maintained the refraction. The difference in refraction was found by the arithmetic mean of the spherical equivalent for the precapsulotomy procedure of -28.85D and post-capsulotomy of -31.75 D , giving a difference of -2.9 .

It was concluded with this study that the use of posterior capsulotomy with YAG laser post facectomy caused changes in the refraction of the patients studied, presenting myopia with greater frequency in the results. With these data, we observed the need for other future studies with a large number of eyes to prove what happened in this study.

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Conditions studied

  • Refractive and Accommodative Disorders

Keywords

  • YAG laser
03

In context

Lead sponsor

Instituto de Olhos de Goiania is the lead sponsor of 27 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

We studied 67 eyes of 66 patients , both men and women by analyzing the medical records of a reference ophthalmologic hospital in Goiás.

Eligibility criteria

Inclusion Criteria: Complete data information about refraction and the date of the YAG laser -

Exclusion Criteria: Incomplete data

-

05

Study design

Enrollment
67 participants (actual)
Patient registry
No
06

What researchers measure

Primary outcomes

  1. Refractive changes after capsulotomy with YAG laser

    Time frame: 6 months

07

Study locations

No study locations are listed for this record.

08

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of May 2016, a primary completion of May 2016 and a completion of Nov 2016. It does not say whether these dates are actual or estimated.

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

Registered
Dec 12, 2016
First posted
Dec 15, 2016
Start
May 2016
Primary completionActual
May 2016
CompletionActual
Nov 2016
Last update
Dec 15, 2016
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 Dec 15, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT02993081
Lead sponsor
Instituto de Olhos de Goiania
Responsible party
Sponsor
First posted
Dec 15, 2016
Start date
May 2016
Primary completion
May 2016
Completion
Nov 2016
Last update
Dec 15, 2016
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Dec 2016. You cannot join it, but the record below documents what was studied.

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