To investigate the effects of panretinal photocoagulation by a multicolor laser photocoagulator with a scan delivery system in eyes with proliferative daibetic retinopathy

To investigate the effects of panretinal photocoagulation by a multicolor laser photocoagulator with a scan delivery system in eyes with proliferative daibetic retinopathy - To investigate the effects of panretinal photocoagulation by the MC-500 Vixi

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000007535

Enrollment

Registered

2012-03-19

Start date

2012-03-01

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

diabetic retinopathy

Interventions

no treatment photocoagulation with a multicolor laser photocoagulator with a scan delivery system photocoagulation with a conventional photocoagulator

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Male or female patients with diabetis mellitus type 1 or 2 who meet the WHO or ADA criteria for diabetes Snellen equvalent of 6/60 or better Newly diagnosed PDR Adequate pupil dilatation and clear media to perform laser photocoagulation, digital photography and OCT scans Ability to perform accurate Humphrey visual field test

Exclusion criteria

Exclusion criteria: Recent (last 6 months) or ongoing poor glycaemic control(HbA1c greater than 10.0mg/dl) Uncontrolled hypertension (BP greater than 180/110mmHg) History of chronic renal failure or renal transplant for diabetic nephropathy Any previous surgical or laser treatment to the study eye Planned intra-ocular surgery within 1 year

Design outcomes

Primary

Measure	Time frame
pain score, operation time, visual acuity, visual field, macular thickness and nerve fiber thickness (at baseline, 3 months, 6 months, one year)	—

Secondary

Measure	Time frame
subjective symptom	—

Countries

Japan

Contacts

Public ContactTakaoh Hirano

Shinshu university school of medicine department of ophthalmology

takaoh@shinshu-u.ac.jp+81-263-37-2664

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026