Sequential Laser Iridotomy Using Argon and Q-Switched 532 nm Frequency Doubled Neodymium Yag Laser: A Pilot Study
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The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT00452998 |
Recruitment Status :
Completed
First Posted : March 28, 2007
Last Update Posted : May 14, 2008
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Condition or disease | Intervention/treatment | Phase |
---|---|---|
Chronic Angle Closure Glaucoma Primary Angle Closure Primary Angle Closure Suspect Fellow Eyes of Acute Angle Closure Glaucoma | Procedure: Q-switched fd Nd:yag in Laser Iridotomy | Not Applicable |

Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 10 participants |
Allocation: | Non-Randomized |
Intervention Model: | Single Group Assignment |
Masking: | None (Open Label) |
Primary Purpose: | Treatment |
Official Title: | Sequential Laser Iridotomy Using Argon and Q-Switched 532 nm Frequency Doubled Neodymium Yag Laser: A Pilot Study |
Study Start Date : | November 2006 |
Actual Primary Completion Date : | December 2007 |
Actual Study Completion Date : | December 2007 |

- Visual Acuity
- Intraocular pressure
- Total power delivered by each laser modality
- Iridotomy patency and size
- Pain rating during the procedure
- Anterior segment inflammation
- Endothelial cell count
- Cataract progression
- Rate of complications

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Ages Eligible for Study: | 22 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria:
- More than 21 years old
- Able to give informed consent
- Diagnosis of either: chronic angle closure glaucoma (CACG), primary angle closure (PAC), primary angle closure suspect (PACS) or fellow eyes of acute angle closure glaucoma (AACG), and in need of a laser iridotomy
Exclusion Criteria:
- History of any prior laser treatment or intraocular surgery to the eye
- History of any corneal disease
- Any ocular infection/ inflammation within the last two months
- Inability to give informed consent

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00452998
Singapore | |
National University Hospital | |
Singapore, Singapore, 119074 |
Principal Investigator: | Paul Chew, FRCSEd,MMed | National University Hospital, Singapore |
Responsible Party: | Cecilia Aquino, MD, National University Hospital, Singapore |
ClinicalTrials.gov Identifier: | NCT00452998 |
Other Study ID Numbers: |
DSRB A/06/293 |
First Posted: | March 28, 2007 Key Record Dates |
Last Update Posted: | May 14, 2008 |
Last Verified: | May 2008 |
Sequential Laser Iridotomy Q-Switched 532 nm Laser Frequency Doubled Neodymium Yag Laser |
Glaucoma Glaucoma, Angle-Closure Ocular Hypertension Eye Diseases |