Pain Perception at Laser Treatment

Pain Perception at Laser Treatment of Peripheral Retinal Degenerations With Green and Infrared Wavelengths

Status

Completed

Phases

Phase 4

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT01033968

Enrollment

Registered

2009-12-17

Start date

2009-01-31

Completion date

2010-05-31

Last updated

2010-05-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Laser Therapy, Low-Level

Keywords

lasers, pain measurement, photocoagulation, retina

Brief summary

The purpose of this study is to compare the pain perception at laser treatment of peripheral retinal degenerations with green and infrared wavelengths.

Detailed description

Purpose: To compare the pain perception at laser treatment of peripheral retinal degenerations with green and infrared wavelengths. Methods: Thirty patients (60 eyes) were enrolled in the study. Each patient had one eye treated with infrared laser (diode, 810nm) and the other eye treated with green laser (frequency-doubled solid state laser, diode-pumped, with 532-nm). The laser treatment was performed following a standardized protocol. Immediately after photocoagulation, the patient was asked to grading pain perception according an 11-point (i.e. 0-10) numerical rating scale (NRS) 2,3, accompanied by the instructions Please rate your pain by indicating the number that best describes it. This NRS is represented as a straight line (10 cm in length). The numbers between 0 and 10 are spaced at regular intervals along the line, at either end of the line are two poles that are defined as the extreme limits of the response to be measure, with '0' meaning 'No pain' and '10' meaning 'Pain as bad as you can imagine'.

Interventions

PROCEDUREretina photocoagulation

Each patient had one eye treated with infrared laser (diode, 810nm wavelength) and the other eye treated with green laser (frequency-doubled solid state laser, diode-pumped, with 532-nm wavelength

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

SINGLE (Subject)

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Yes

Inclusion criteria

* horseshoe tears and dialyses, besides operculated holes and lattice degeneration in symptomatic patients (photopsias) or with history of retinal disease

Exclusion criteria

* severe liver disease, pregnancy, patients on regular analgesics, previous laser photocoagulation, and age less than 18 years old.

Design outcomes

Primary

Measure	Time frame
Although the treatment of peripheral retinal degenerations with infrared laser to be well tolerated by the majority of the patients, it is more painful than with green wavelength.	—

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026